Ya, must say I have no motivation to swap my E61 for the current iPhone. Sure its slick & sexy, but thats all about style with little in the way of substance (esp. for business users). I have yet to find a phone that has this combination of ability ...
VoIP - no bs clunky app, SIP is built into the base OS/dialer.
MS ActiveSync - natively sync email, contacts, calendar, task directly with Exchange server over WiFi or 3G
Global Addr Search - quickly search Exchange server's GAL for any info
Proper Windows Messenger Live - not some 3rd party clunck app
Proper HTML browser - not as good as the iPhone's, but not too shabby either
and the clincher ...
One handed operation - due to form factor, large screen & front mounted full keyboard inc. joystick, every function (email, sms, browse, IM etc.) can be operated single handidly (e.g. while driving).
Yes the 3G iPhone (v2) will provide a lot of the above, but by then the E71 will be around ... think I know which way I will go.