The new DCU launced today. I haven't picked anything up, but I subscribed to a few of the new series. I probably won't start receiving them for about 2 months, but they'll start with the #1 issues. It's a bit of an annoyance to be 2 months behind all the time, but it's way cheaper than buying them from comic shops, and I don't have to worry about missing out on any issues (my local shop's pretty unreliable). They also give you one title for free if you order more than 4 subscriptions.
It took a while to decide what to go with, but I narrowed it down to these in the end:
Batman: I used to get this one, but stopped around the time that they "killed off" Bruce Wayne. The whole Batman line got a bit convoluted at that point, so I just stopped reading DC alltogether. I've heard a lot of good things about Scott Snyder, so that's why I opted for this one.
Nightwing: I've always been a fan Dick Grayson. I don't really know much about the writer, so I'm hoping this one turns out well.
Batgirl: I'm not a huge Batgirl fan, but I've heard nothing but good things about Gail Simone, so I figured this would be a good point to jump on.
Justice League Dark: I really liked Peter Milligan's run on X-Men a few years back, and the cast seems pretty interesting.
Green Lantern: Another title that I used to read pretty regularly. I stopped reading before all the Darkest Night stuff went down. I like Geoff Johns' work, so I'm pretty sure this one's going to be a safe bet.
Action Comics: This one's solely on the strength of the other Grant Morrison stuff I've read (including All-Star Superman).
A few other series look interesting (Justice League, Wonder Woman, Flash, Blue Beetle), but I'll wait for the reviews to roll in on those.