Here's my humble Shadowrun site. There's not much here right now, but more stuff is in the works even as I type this, and hopefully what I have will be well-received. All of this pertains to 4th Edition, as it's my favorite edition and the only one I have.
You can find me on Facebook and MySpace; I'm trendy like that. Feel free to add me to your contacts, give me feedback or whatever.

Upgrades: While the SR4 system is great as-is, no rules set is complete until I get ahold of it. These rule mods range from practical to fun.

Menagerie: A selection of new metatypes and sapients (including shapeshifters). Included are care and feeding instructions, no extra charge.

Mysticism: A catch-all page for magic. I offer rules for a more open-ended magic system. Further, I present new magical traditions and spells and adept powers for players to use and abuse.

Dark Ops Tech: Remember Perfect Dark on the N64? Ever think how cool that stuff might be in Shadowrun? Well, I've thought that, so I've converted some that game's weapons to SR rules. Even if you've never played Perfect Dark, you may find these weapons and devices useful.

Shadowrun Links
Here are some Shadowrun links well worth checking out. I'm looking to add more, so if you know of any other good sites out there please lemme know.
Shadowrun (Catalyst Game Labs): Here's the obligatory link to the official website. And here's their official forums.
Dumpshock: A great site for Shadowrun fans, with insider info and game resources. Be sure to visit the Dumpshock Forums, a vibrant and (mostly) friendly community of fans and players. I'm "I Hate All Life" on the forums, look me up when you get on there.
Khadim Nasser's Site: An entertaining Shadowrun fan page (also stuff for Eclipse Phase, Doctor Who and C.L.U.E.), and the home of the famous What Would Samurai Do? A good read, all of it, though I especally recommend the Art and Fiction section.
Aaron Pavao's Shadowrun Resources: Another good SR fan page someone introduced to me. (Thanks for that.) There are character generators, sample adventures and player-friendly "cheat sheets" available here.
Another Runner In the Night: A wiz Shadowrun web comic done by the myterious Blade, from which I've scammed some artwork -- with permission, of course. It's dark and atmospheric, and a good storyline. Here's hoping Blade does more issues!
The Dragon Girl's deviantART: While not strictly a Shadowrun page, I've used some of this lady's SR-themed artwork (which I've hyperlinked). Thanks so much, Jenny! Visit her site and give her some props.