Well, in an earlier Announcement I said something about putting up a thread for good Perfect Dark sites, so now I'm doing just so.
Perfect Wiki - The Perfect Dark Wikihttp://perfectdark.wikia.com/wiki/Main_PageA user maintained Wiki (like most if not all of them actually) that as of late I've been spending *a lot* of my time on editing and reading up on. If you know a good deal about the game's story, it's plot, gameplay, or whatever, join up and help edit and maintain the articles. (seriously, there's some stupid people there that edit these things. One time someone created a article for the Felicity map and all they put was 'it has clean toilets' for the article information.) Or if you don't want to waste your time editing the wiki, you can pass the info onto me and I'll try to update whatever article it has to go to ASAP.
In Perfect Dark - A Perfect Dark Fansitehttp://inperfectdark.com/A good fansite that has a plethora of information from game strategies to character bios, series news and some nice wallpapers.
Perfect Dark Reconhttp://perfectdark.retropixel.net/Similar to In Perfect Dark, but has a better & cleaner layout.
Perfect Dark: Sourcehttp://www.pdark-mod.com/joomla/Using Garry's Mod (I assume, but I'm probably wrong), fans (or fan) of the original Perfect Dark are trying to recreate the N64 classic for the PC. (please note that I haven't really looked into the site recently, so my info is probably off. Still couldn't hurt to check it out.)