I suggest to use ..= (or ...=) in place of the keywords 'wait for', and 'from'. Less words, and '...' traditionally means 'to be continued', or 'wait for a while'.

For this Kal code:

  task getUserFriends (userName)
    wait for user from db.users.findOne {name:userName}
    wait for friends from db.friends.find {userId:user.id}
    return friends

would become:

  task getUserFriends (userName)
    user ..= db.users.findOne {name:userName}
    friends ..= db.friends.find {userId:user.id}
    return friends