Why is Portable Thunderbird cool?
My job takes me around campus often not knowing where I will have to spend the extra half an hour between meetings. Logging a laptop around works, but gets heavy after a while. I found that I can leave the laptop behind, just bring a flash memory drive, and use the public computer labs. Since a lot the work I do happens via email, I need to be able to access my email reliably with the familiar interface and search functionality. This is where Portable Thunderbird comes in.
Portable Thunderbird allows you to connect to your email from the flash memory drive. Portable Thunderbird - don't leave home without it!