Hello Chaps!
Here is my setup:
Delkin Fat Gecko Dual Suction Camera Mount - Only £69.99 - SRS Microsystems
(they do a single suction mount too for around £30 - which would be ideal for helmet cam)
ALDI - Special Purchases from November 16, 2008*
Got mine for £60 at Aldi and just seen another on ebay for £30. Tempting for audio only as Copperdog suggests...
Pros - Cheap, full of HD goodness (it's the future, you know!) and there is that all-important screen for spot-on shot composition and review.
Cons - No waterproof housing (who wants to see me in the bath anyway) thread on base of camera can be a bit flimsy but it's nothing a small screw and some Superglue can't fix....
Obviously it's all down to personal preference but I would always want to review the footage straight after shooting it to make sure I've definitely got it right. I would be most upset to get home and discover it's not right or I knocked the camera out of position or something silly. A lot can go wrong! (I work in TV so I know this!)
Cheers!
Simon