GMail on Mozilla Prism then Mail.app for everything else - I don't have a clue how Thunderbird performs on the Mac, but Mail.app works fine atm.

Lastly, Thunderbird on Windows

Here.

Then start writing/blogging anything that interests you. Over time, you'll get the groove on and start forming topics that may pull in readers.

ClamWin is ok, but the scanning time is very slow.

Switched to Avira for almost a year now for most of the machines at home and friends. No problems so far, and works fine.

Still, the nag screen is annoying, but how hard it is to click one button. :P

Works pretty well on 10.5.7 with WinXP SP3 as guest.

I couldn't install a firewall for testing (Comodo CIS, it'll hang WinXP on reboot) on the guest w/o VT-X/AMD-V off. I hope they fixed it in this new version.