Hi Fenton
Concerning the Bluetooth - I think the NB550D uses an Atheros combo-card with both WLAN and Bluetooth. Am I right?
If so, there seems to be general problem getting the BT to work properly, wireless works well though.
I have filed a bug to Fedora Bugzilla concerning this issue on an R830 - uses the same module I think.
Link:
https://bugzilla.redhat.com/show_bug.cgi?id=734369
Concerning the mic - basics first:
- did you check the sound input settings and turn up the recording level?
- did you try an external mic? You can for testing purposes use a headset / earphones as a MIC since they work exactly the same. You may have to shout to get any input however

If the external MIC works you may want to try booting the unit on 11.04 or maybe even any pre-release of 11.10.
This to see if the MIC-issue is resolved.
If so, I believe some googling will supply you with a solution!
Anyway, let us know your findings so we can help you along.
Cheers
Tom