The solution of this problem (which involved the use of my mobile phone), produced really excellent results, and had some wonderful side-benefits that using the mic. in the camera simply couldn't compete with. I now routinely record all my audio seperately using this technique.
One of the benefits is being able to pick up perfect audio at any distance from the camera without the need for radio-mics, field recorders or boom poles.
In this video, I show how to use the technique - It really is simple, requires only a mobile phone and some gaffer tape, and produces excellent results. Check it out in the video below.
BTW. I routinely post any music, or sound effects used in the videos to my website at www.meejah.co.uk They are all licence-free so help yourself if you need them.