I recently started with the testing of Eset Smart Security 3.0.128.0, which is currently in Beta stage. Eset Smart Security firewall isn't so good as ZA's one, but it sure is better than Vista's integrated firewall and it's serving it's purpose very well with some few exceptions, after all it is still in Beta.. I've posted the news article here where you can find links for downloading and registering for a beta testing program.