I face a dillemma here. How do I get the bitcoin client into a non internet connected machine? This is assuming that you can never 100% trust the computer you're using to download the client.
1. Download LinuxCoin ISO.
2. Put LinuxCoin ISO on a CD or USB device
.............................................................
Your described method need a blind trust on LinuxCoin ISO.
Did anybody audit it ?
You are correct.
I compared the bitcoin executable to the same version number that was posted on sourceforge.
But then again, your question needs a blind trust in me (or some other auditor), unless you are willing to audit yourself. In addition, this whole system is based on open source software that should be audited by a trusted auditor. I didn't audit the source of Bitcoin, and don't personally know and trust anybody who did. Did you?
The risk is that LinuxCoin ISO is spitting out "predictable" wallet ID's. You can create your own wallet file manually if you want.
LinuxCoin was created by some people in the Bitcoin community with reputations. I don't personally know drgr33n, gnukix, Davidonpda, or Xenland. So don't trust my recommendation. Use your own judgment. I'm not making paid endorsements, I'm just suggesting what looks like a reasonable path.