I have a page that has had it's PR hijacked.

If you google for "antivirus reviews", you'll find a listing on the 2nd page for "AntiSource - Review of 11 Popular Antivirus Applications". Some site archiving service (furl.net) is doing a redirect to my page, and Google is treating it as the new permanent page. My original page no longer shows up in the results.

I would like to change my .htaccess file so any redirects from furl.net are sent elsewhere.

block their ip.

I tried blocking them by domain but after some research I realized that won't help me. If someone visits my page through their redirect, it is still their ISP they're coming from and not furl.net. Also I can't block by the referral, because Google apparently doesn't leave refferals - it was explained to me that when there are hundreds of links pointing back to you, you wouldn't want a search engine to crawl each link over and over and over just to give you a referral in your logs. So I can block the referral to stop visitors coming from that redirect, but it won't stop Google and I've been shot in both feet (by denying visitors).

Send a shirty e-mail to the sites. If they don't respond, send a few more. Also try reporting them to google and see if you can get them banned. Always worth a try...