Get droid eris on Sprint network?

[seltrecht]

Anyone have a answer to this question? I to would like to know if it can be unlocked to be used on sprints network. My mother-in-law has a $600 credit with verizon and can get this for me as a gift, but im on sprint and don't really want to switch to verizon and i can't afford the hero right now....any information would be greatly appreciated, thanks.

EDIT: Also I know sprint uses picture mail and what not, if the phone can be unlocked onto sprint will it be able to use picture mail and other functions? or does unlocking it to another network makes some of the applications not usable? If so, what would that be ?