Thought for the Day: If you are going to have a twitter account for your recruiting I suggest you follow Google's lead.
Check out https://twitter.com/#!/googlejobs
Entitled "Life at Google" their twitter account is a living, breathing, active communication tool for their recruitment strategy. They link to job openings but they also COMMUNICATE WITH CANDIDATES! Something many corporate twitter accounts fail to do. So if you are going to tweet about your jobs, make sure its a 2 way conversation. (and that goes for your facebook page too).