old thread, I know, but from what I hear today (1/1/08), Sprint is still not officially supporting the Treo 755p or Centro. However, others have found success in installing bizconn.prc from their 700p onto the 755/Centro, then installing Sprint Mobile Email on top of BizConn. You can get Sprint Mobile Email from the Downloads section of the Sprint PCS homepage via Blazer.

I'm also a CLP, and believe me, it pains me to see Palm jumping all over the MS Exchange bandwagon. MSFT already has Windows Mobile devices which will better support Exchange than any PalmOS device. Palm should try to appeal to the Lotus Domino crowd rather than being the underdog in the mobile Outlook/Exchange e-mail game.