Its pretty cool for moving around from computer to computer and not leave any tracks.
Very handy at work so you don't leave you personal email accounts, AIM accounts, and bookmarks on your work PC.
Would be cool when using a relatives or Internet cafe computer.
I just loaded the smaller version on at 128 MEG stick and it seems kinda slow, but probably worth the waiting.
http://portableapps.com/
Convenient
Now you can carry your favorite computer programs along with all of your bookmarks, settings, email and more with you. Use them on any Windows computer. All without leaving any personal data behind.
Open
PortableApps.com provides a truly open platform that works with any hardware you like (USB flash drive, iPod, portable hard drive, etc). It's open source built around an open format that any hardware vendor or software developer can use.
Free
The Portable Apps Suite™ is free. It contains no spyware. There are no advertisements. It isn't a limited or trial version. There is no additional hardware or software to buy. You don't even have to give out your email address. It's 100% free to use, free to copy and free to share.