The comics guys are putting up a big "introduction to comics" topic on the 7th IIRC. It's gonna have a ton of writeups that will cover DC since that's rebooting soon, but I imagine you'll be able to get some really good advice on how to get started too. That's what I'm doing myself.
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Currently playing: League of Legends, Chrono Cross.
Current Projects: Fool's Overture, CYOA: http://www.gamefaqs.com/boards/8-gamefaqs-contests/60143513