I always find it interesting how people here, a tech forum, are so resistant to new trends and websites in the industry. Having a personal (but professional) website, a Facebook account and a Twitter account is practically essential in establishing your professional "brand".
I'll recommend:
@digg_2000 - Stories on digg.com with >= 2000 diggs
@wired - Wired Magazine
@tweetmeme - An aggregate of hot topics on Twitter
@Helen_Keller - Helen Keller is on Twitter, yay!
@azizansari - Aziz Ansari, comic and regular on Parks & Recreation. I've never seen the show, but every time it's on, he badmouths the TV show "Bones" which plays in the same timeslot. Hilarious.