Congrats on the new iBook! You'll love it
You can definitely put Tiger on it. I had Tiger on a 500 MHz G3 iBook and it ran fine. If you don't like memory-heavy things like Dashboard, you can disable it. Otherwise, I thought it was great.
I'm sure that you could play Quake 3 on it. Try downloading the
demo here and play it before spending your money on the full version.
I'm not sure about the other apps...I've never heard of them.
And like discotronic said, you could upgrade to a SuperDrive if you wanted. I've heard that Newegg.com has some great deals on slot-loading DVD-burners for under $100.
Unfortunately, the translucent keyboard is limited strictly to its color. It's not backlit.
Best of luck!