I have been on Smartphones of varying kinds for the last 6 years. I have previously owned a palm treo, a black berry, a Motorola Q (not technically a Smartphone to me), and now the XV6800. All have had their good and bad points.
I checked into an iPhone initially, but with no ATT in my area, I would have to get a long distance number from colorado and that just did not suit me.
My primary use for the phone is for work.
My xv syncs contacts and email with my corp. exchange server. It also sync's multiple Google calendars into a single point of reference for both work and personal. I use oggSync currently, which does a good job of sorting the different Google calendars into different appointment categories for display on the phone.
I also sync some contact information (birthdays and such) to contacts linked to facebook.
I am hoping to not take a step backwards with this level of integration should I move to a droid.
I will likely be rooting the phone and changing roms, as the ability to tether (USB or Wifi) is a must for me when I travel for work. I have done a lot of reading before even joining the forum, and I am hoping for insight from more knowledgeable users to make sure I am not jumping into a phone that will leave me short of the functionality and tools I am used