Typically, the updater runs about once a day. If you take another look, it will show the latest security update :) We're working very, very hard to guarantee that no updates go missed and ensure that you receive a notification within 24 hours of any update going out.
And while, yes, you can watch the RSS feed or Google group, do you really want to do that for Django and the other 29 libraries you use?
It shows the update now, it didn't when i posted my reply, however its still fast enough compared to when it was announced by django's official communication channels.
A bit off topic but i have some thoughts on the website since i might be interested to using it in the future: It would be great if you could lower the 'within 24 hours' to something like 'within 2 hours'. I understand the difficulty of that since you are tracking over 100.000 packages according to the homepage but a 24 hours dilation is a bit too much, i don't deploy code yet in any high traffic sites which could be subject to a 0day security attack but still i find the dilation too much to consider it as a viable option for the future.
And while, yes, you can watch the RSS feed or Google group, do you really want to do that for Django and the other 29 libraries you use?