I use the T-Mobile $5.99 plan as well, but its pretty limited, speed is not much of an issue so far, but you can only use it for web browsing it seems, and for some reason the other day I couldn't go to secure web pages(coulda swore I was able to before) not sure what this issue is but it was annoying...

Anyone have any idea how to use this service for more than web browsing(ie chat/im, music streaming, etc...)