So how about we turn this into a what's your set up thread?
Hardware: I'll get started. I have three Macs: a Mac Pro, a MacBook Pro, and a MacBook Air. I also have an iPhone. The MacPro and the Air were bought by my company, the MacBook Pro is my personal machine.
I find myself using the MacBook Air a lot. I can take it anywhere with me. When I'm not using it, I'm using the iPhone. If the Air had a SIM card slot I'd probably use it even more.
On the MacPro I have a 24" Samsung monitor. All the other machines I use with their native screens. I also have a Kindle.
Software: I use emacs for writing and coding. I use a mixture of Firefox and Chrome for most everything else since so much of my computer life is in the cloud. Bits of software I love are: Dropbox, Notifo, Evernote and TweetDeck.
Dell XPS M1530 laptop; FreeBSD 7.3; KDE 3.5.10. Konqueror for websites where it works, Firefox when necessary. Thunderbird for email. Text editing in kwrite unless I'm in the middle of doing something in a Konsole, in which case I'll probably use nano. Backups via tarsnap, of course.
On servers, mostly FreeBSD 8.0 (a few boxes are still 7.x), along with djbdns, qmail, ezmlm, apache, stunnel, and tarsnap.
On my android phone: Twidroid, ConnectBot, NetCounter.
For work I use an XPS M1530 with Windows 7, VMWare and a collection of images with different OSes for various purposes. Notepad++ for editing, Eclipse + PyDev for development, Ollydbg and Immunity Debugger for vulnerability research, too many tools to list for penetration testing, OpenOffice for documents and spreadsheets, Google Talk, Thunderbird for mail and TSK and Responder for Disk and Memory forensics.
We have some servers at work, mostly Mac Mini and Linux (to host VMWare, various images from Beos to Sco Unixware), Solaris Sparc box and an old Vaxstation running VMS.
At home I use a 9 year old Vaio SRX-51P/B with a P3 850, 256mb of RAM and Arch Linux. I mostly use Mutt, Chromium, Irssi, centerim, Vim, MC and snownews.
At home I use an Ubuntu 8.04 server mostly for media, printing, DNS (was using djbdns but switched to dnsmasq after a rebuild) and backups and a separate Arch Linux desktop as a MythTV Front/Backend.
Hardware: Dell Vista box with 24" and 22" monitor and Mac Mini with 22" monitor with single wireless Logitech Wave keyboard/mouse via Synergy. Dell Mini 9 netbook with Ubuntu Remix also hooked to Synergy when its at my desk.
Software: use Window's box for dev work - Notepad++ for editing, FF/Chrome for browser, and Mac for communications - Adium for IM (AIM and internal Jabber) and Colloquy for irc (wmassdevs on freenode) and FF for gmail/google apps/co-op/basecamp/etc.
If I had more desk space I'd have more monitors. I'm moving soon and may end up either attaching monitor arms to the walls or building a shelf for the second set of monitors.
At work, I use a Dell Optiplex 755 running Ubuntu 9.10 with a 22" HannsG and 19" Dell LCD. At home I use a 15" MacBook Pro (1st Gen "lap burner") connected to a 22" Acer 1080p LCD when I'm at my desk.
Software-wise, I usually run either Eclipse when I'm at work doing Java development or Intellij Idea 9 when I'm on the Mac at home doing Grails development for side projects. I usually keep an instance of VirtualBox open when I'm at work so I can run Windows XP and Microsoft Outlook since Evolution on Linux is a POS. At home I use Mail since I can check both my work Exchange account and GMail account and it just works. I bought Snow Leopard for just that reason.
My primary hardware is an HP mini. But in all actuality, it's a slicehost ubuntu server running GNU Screen that I can SSH in from any device that can run a descent SSH client, including an iPhone.
The terminal app on a jailbroken iPhone is remarkably good at inputing complex emacs keyboard shortcuts once you map the gestures right and it becomes second nature. Can't wait to jailbreak the 3G iPad. If that works out exactly like it does on the iPhone it could become my primary hardware.
Computer 1: 13" plastic MacBook running Snow Leopard.
Software: Emacs, Quicksilver, Firefox, MacIrssi, Adium, Terminal and (even though I hate its guts) iTunes.
Computer 2: Dell 1520 running Windows 7. I also run Haiku in a VM.
Software: Emacs, Launchy, Firefox, XChat, Pidgin, PowerShell and (praise be upon its sweet soul) Winamp.
Web applications: GMail and Etherpad. I'm not big on webapps.
MacBook + 24" Dell Monitor at work. 24" iMac at home. I have an iPhone (for being mobile) and Kindle (for reading), too. And a moleskine squared notepad which I take everywhere.
Software: RubyMine, Sequel Pro, Dropbox, Adobe Photoshop & Google Chrome. And GMail.
Hardware: I'll get started. I have three Macs: a Mac Pro, a MacBook Pro, and a MacBook Air. I also have an iPhone. The MacPro and the Air were bought by my company, the MacBook Pro is my personal machine.
I find myself using the MacBook Air a lot. I can take it anywhere with me. When I'm not using it, I'm using the iPhone. If the Air had a SIM card slot I'd probably use it even more.
On the MacPro I have a 24" Samsung monitor. All the other machines I use with their native screens. I also have a Kindle.
Software: I use emacs for writing and coding. I use a mixture of Firefox and Chrome for most everything else since so much of my computer life is in the cloud. Bits of software I love are: Dropbox, Notifo, Evernote and TweetDeck.