Ok, I just spoke with Brian (who was very helpful) and this is the info you will need before going to the Sprint store.

This update was released to all Sprint stores, but not all Sprint techs know about it.
What you need to do is tell them to look in their system in the i500 folder (possibly may need to click on view all files) It should list xg23. Also the phone will need to be reset (pop the battery for a few seconds) once it freezes up (which it tends to do after this update). You will lose all sync'd phone #'s and software.
It does require a special cable and some stores may not have it, you may have to wait for them to order the cable.
It is the PST cable for the I500/I700.
Hopefully this will help the people who are getting clueless reps at Sprint stores.
Thanks...