I tried it myself and it works
will post some pictures later, don't have camera right now
Flashed originally Telus 700p (was using Sprint 700p 1.10 MR) into 755p Sprint 1.04MR
You need to get the following (ALL AT YOUR OWN RISK)
1) romupdater.prc (its in the SD 700p updater. I did **not** try the 755p updater)
2) run romupdater, it should say "VENT" and "DVT", if you do not see that DVT, do not flash!!! (VERY IMPORTANT)
3) d/l my file and put it in SD card under directory \ROM
4) charge battery, FULL BACKUP!!, run romupdater and type 'ventura'
The radio rom can also be updated, but it becomes version 176. Will see if there are differences later on.
You get the new icons like
1) My Treo
2) Bejeweled
3) Get Nuance
4) GoogleMaps
5) IM
6) Sprint Store
(Thats the difference I saw between the 700p and 755p version)
As to the A2DP bluetooth in the options, I did not see that and I don't have A2DP to try.
(but you can get Voice gateway working and use your computer as a bluetooth headset cool)
Also I don't use SMS so I don't see any difference there also.
http://rapidshare.com/files/88032709/700pto755p1-04.rar.html