That is a fairly obvious commercial progression. But nevermind. There is actually a better alternative, although not quite as small a footprint, but if you have 128M or better this will work:
Sygate Personal Firewall
Sygate make a personal firewall. It has a lot more features and is very informative. Some of the nicer bits of Tiny are missing, but it works well. I use this now and have no complaints at all.
MG