Just adding my 0.00002 BTC

I run OSX.  My security is:

1 - Create small truecrypt volume ~ 30mb
2 - Mount truecrypt volume
3 - Install (first time) and run (every time after that) the Bitcoin client from truecrypt volume.
4 - When not using Bitcoin client, simply close application.
5 - After Bitcoin client is closed, dismount truecrypt volume, which then is a highly encrypted file containing wallet.dat and all other Bitcoin app files.

I'd be interested to hear anyone's thoughts on this.  It is very simple, and allows me to store my encrypted file anywhere as a backup online.

Also worth noting the reward for survey completion is about 0.0038 BTC if I recall correctly. 

Yeah I tried these surveys and after they take all personal information it soon ends with 'Sorry, you didn't qualify for this survey'.  By that stage they have everything they need, having sucked out more personal info than Facebook asks for on a good day.

Be wary of these survey sites.