If you are already using the BES at work, it will be easy enough. Back up your old BB. Connect the new BB. Desktop Manager will ask if you want to switch PINs (switch BlackBerrys) - reply yes. Presto change-o

Then resync, or run a selective restore (using the backup created earlier) to move back non PIM items (like custom autotexts or browser shortcuts or whatever).
I have also read that password keeper does not come installed. I don't think that VZW has published 4.0 yet, so you can either try the Telus version, or hang out a bit.
Good luck. The 7250 looks great.