Hey gofaster,
The game based on "Black Hawk down" is called... err "Black Hawk Down!

It's been delayed 'till next year - but there is a multiplayer demo out! Very nice gfx (Commanche4 engine) and some innovative features like riding on a chopper along with the thrilling (scary) scenario! It developed from the Delta Force series - but has a brand new KI engine (the Taliban in the last part were really, really stupid). Looking forward for that one!
---
Iron Storm. I played the demo, wasn't too impressed. The story is quite interesting though and it might be worth a shot. Reviews say it's too hard to be fun.
---
NOLF2 (No one lives forever). Definately a highlight. Funny setup (a la Austin Powers) decent AI, lottsa gadgets (exploding Kitty), action and stealth parts. One very good single player shooter which should entertain you for some hours. Multiplayer part subpar (although it features innovative coop play)
---
Americas Army. It's free, it's very realistic, it gets a bit repetetive after some time. Great gfx & sound. Many servers up - continous updates. You can only play the "good ones" which is a flaw in my opinion.
---
James Bond: Nightfire. A must for every wanna-be 007. Old gfx engine (Halflife) but looks decent. Many Q gadgets, Bond girls and lottsa action from various films. Bad AI. A bit console like.
---
Unreal Tournament 2003. The BEST "sport-shooter" out there. Superbe gfx, adrenaline pumping action, great community. Not for the realistic, tactical games though. Too fast paced for my taste. Waiting for WW2 mods...

---
Battlefield 1942. Fun arcade shooter with big team aspect. Single player mode is subpar, rocks online. Very simplified vehicle control, planes are so arcade I cannot handle them...
---
WW2Online. FPS if you play infantry. Great variability in gameplay. Realistic controls. Pay for play. Best if you are into armour driving!
Decent flying part.
---
Hitman 2. Not quite a shooter but very challenging gameplay. Assassination-"simulator". Quite brutal, stealth and action elements.