I've just got a wireless microphone called SH-600, a cheap setup that I will use when doing user group talks or any presentations that I am allowed to record on my own.
Rather than using the horrible built in microphone I got a cheap but much better solution. The Audio Quality is OK, not as good as the high end microphone I use for the online courses, but still decent enough - better than recording with the built-in!
What do you think?