Thanks, DangerDave. Here's a little more info on Strongbox.
Strongbox is a whole new approach that is WAY above and beyond
anything like Password Sentry.
Not only does it keep the hurlers from getting in, but it discourages
them from even continueing the attack and slowing your server.
It protects from hurlers (brute force attacks), password sites, and various
other evils.
Unlike PennyWize, Password Sentry, or other old fashioned approaches,
Strongbox is 100% compatible with the latest versions of Microsoft Media
Player.
All that, and the price is definitely right.
Several of the well know members of this board, TLA's, and
GFY use it on all of their pay sites and swear by it.
For more information, see:
http://webmastersguide.com/?htaccess-cgi/strongbox/