I'm having a similar problem in my Acura TL since I went to the 8700g as well... bluetooth doesn't stay connected. If I've got an active call going, the connection stays... but if the phone is idle, the connectivity flickers.
Your boss may want to set the HandsfreeLink(tm) connection as a trusted connection... this will prevent the BB from asking for the password each time. If he doesn't remember the password, you may have to repair the devices.
Sorry, I don't have the 8700g, but if check the Acura HFL mini-site (found through viewing the TL specs on Handsfree Link) and submit a problem pairing (there is also information about proper pairing) to customer service - they're fairly prompt in getting back with you and will work with you on getting your Blackberry paired. Blackberry's tend to pair easily as well as offer more functions than most bluetooth phones. And yes, I own a TL and have a 7100t paired flawlessly with it. Good luck and hope things get resolved for you soon.