PGP Desktop 10.0 Beta has just been released, with full support for Snow Leopard 32 and 64 bits. This is very good news for all the security concerned people who were stuck on Leopard (including me)!
PGP Announced this on their beta blog, on this post.
If you want to participate to the beta, here is the [...]

After posting the previous article, I have done some tests on a disk encrypted with PGP WDE, and benchmarks show that the performance hit is quite big. Strangely, there is no visible difference during the normal use.

This article covers the different options available on the Mac to secure confidential data.