Wait, I'm confused....
People are still using Mt.Gox?
Who else are you going to use? Everyone else has lax security or no US-customer options.
CampBX is in the US. Do they have lax security? They also use Dwolla.
CampBX is solid, they just don't cope with load that well (site is very sluggish right now). By the way Dwolla transfers on CampBX are working just fine, I withdrawed some $ just now and received it in Dwolla instantly.