Like so many others, I can't get Corporate Sync to talk to our Exchange Server. I have not had this problem with any other Droid models or iPhones. PPTP VPN's won't work either. The demo copy of Touchdown works great however. I'm hoping this is all fixed when Froyo 2.2 rolls out which is rumoured for August 6th. If not, I'm giving this DX back to Verizon!