It's horrendous practice to keep all three URLs active. First choose one URL you want to use from now on. Preferably it would be with the www, but bink.nu has a high PR without it, so I would go with that. Use an .htaccess file to 301 Redirect www.bink.nu and winxp.bink.nu to bink.nu. At the end of google's next update, it will take into consideration it's the same page, and PR will (I believe) be forwarded, along with all backlinks. Check out http://www.daniweb.com/forums/showthread.php?t=7965 for more info.

The problem is that you are playing Russian Roulette with the duplicate content filters - best to use a 301 redirect on 2 of the domain names, or simply park them on the other domain.

I agree with I Brian, Google hates duplicate content, If i were you , i would change soem of the content, alter the theme colours and the logo.