Just clarifying one of my answers - I said "Converting my current campaign to 4e," which is only true in a hypothetical sense. I intend to finish my current Age of Worms game in 3.5. I just can't stop myself from thinking, "Okay, so then the Binder becomes a Warlock, wonder when the Vestige Pact info will come out? I need the multiclassing roles to see how hard it'd be to make something like a rogue/wizard for the Beguiler..."
I'd love to convert the game to 4e, but we've got a party full of characters that rely on stuff that isn't in the 4e first wave - we're set in Eberron, so we've got a dragonmarked artificer with a warforged cohort, a changeling binder, a druid / dragon shaman, a monk / assassin, and a beguiler. Not a straight conversion in the bunch! I can't stop planning the hypothetical conversion, though....