Really? I'm gonna have to go check that out around here. =] Much more comfortable getting my phone through Sprint than BB-- especially since I'm switching service just for this guy.
A while back, Sprint was offering a deal where if you ported you number from another carrier you would receive a $125 credit on your bill. They appear to have extended this offer until 6/23/11, so assuming the EVO 3D comes out before then, this may be of some value to you, and others, that are considering the EVO 3D and are new to Sprint. Follow the directions carefully, you only have 72 hrs to fill out the application after porting your number.
Port In Credit
EDIT: Great News, its been Extended AGAIN, now till 7/23/11!

www.sprint.com/switchtosprint