I'm using the Sprint 7130e. Browsing is fine. Yesterday I had some serious email delays, but I don't know if it was due to Sprint or my company Domino server. (Or maybe some
massive tangled tubes).
Today messages are instantaneous.
EDIT: This is using the BIS service. Until I get hooked into the BES, I'm using a forwarding rule to my sprint.blackberry.net address.