I have the Jabra BT800. It does not work with the Blackberry (tried 7290 and 7100). It will pair and you can talk, but you will have problems answering, hanging up and dialing from the call list. I have also had a few weird phone disconnects while using it that I haven't had with the wired headset. I got the BT800 before Jabra updated their website. I believe if you can find their compatibility table they now have both the Blackberry and the BT800 on their lists. All combinations of BT800 and bluetooth Blackberries come up not compatibile.

<rant>I know other's have had good luck with Jabra, but my opinion of them based on this post-sales support experience is their products are junk and their company sucks. I would never recommend anyone buy a Jabra product. Their customer service is unresponsive and they don't care about their customers.</rant>