I imagine this goes without saying, but...before you jump on that Verizon iPhone bandwagon (Oop! Too late?) know what you're getting into, hear?
As Tai Chi (my sister-in-crime) pointed out, Verizon's iPhones won't be usable in Europe, currently. For the rest, Lifehacker gives you the whole rundown of what you are and aren't getting with Verizon here.
Me? I think I'll wait until next year (so long as my aged 3G holds out!) for the iPhone 5 with its CDMA/GSM/UTMS chipset (I'm spouting words whose meanings I can only guess at! Thanks, NYT & ReadWriteWeb!) and - likely - the lower cost/wider options available data plans resulting from the fallout of the Verizon/AT&T competition between now and then (Right? RIGHT!? That is how this'll all play out - in favor of us consumers, I mean - isn't it??)