The latest revision of Parallels Desktop for the Mac is running butter smooth on my Mac Pro with 2GB of RAM. No hangs or crashes. In fact, right now, I'm using Ecto for Mac to write this post while watching DL.TV Episode 100 and installing software updates on Windows XP.
To be more specific, the update is for my Sandisk 4GB flash drive. I can't recommend this drive enough. It is fast, small and holds a ton of data. It also came with U3 Cruzer security software that allows me to carry sensitive data from my day job home totally encrypted. The down side is that the software is Windows only. But now that I have Parallels on my Mac, I have access to the secure data any time I want. While getting the Cruzer software installed and running under Windows was pretty quick, the Windows update that I performed on my system was another story entirely.
Check out the number of updates in this set. 59!!! Has Apple even had 59 updates ever? This seems pretty crazy, but I went ahead with the updates. I don't want to get any of the Windows nasty little bugs in my Parallels install.