I use 3M Vikuiti CV8 Display foil on both Cam and Phone. This is a thick, crystalclear foil which is easy to apply and without bubbles. It's a cheap but very usefull solution. I gives a good protection, and if it's scratched, just peel of the foil and apply a new one. Just search at
http://www.ebay.de" onclick="window.open(this.href);return false; and you will find tons of these. They are pre-cut for various types of Cams, phones, pda's etc.
Hope this helps
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