Steve I'm pretty sure they (at least the first GoPro post) were kidding.
Anyway, it depends on a number of things:
How much money are you willing to spend?  Do you realize that you'll be shelling out thousands of dollars, regardless of 7D vs. t2i, on lenses and support and glidecam and accessories?  The price of the body is VERY decieving.
How experienced are you with video?  Are you looking to get serious?  Would an HV40 suit you better?
Do you know the downsides to DSLRs?  Require lots of time, very short running record time, over heating, no zoom, shitty audio, jello shake, no auto settings for your friends, etc?
I don't mean to sound condescending here, and if you already know all about this stuff, please by all means let me know and we'll move on to different questions, but are you sure you even want an HDDSLR in the first place?  To be honest unless its serious, they're not the best cameras for a "video blog."