These Corsairs obviously are not "top of the line," so don't jump at this without considering your options. They say this is CL2, but the full timing is actually 333MHz at 2-3-3. Those timings are CAS Latency, RAS-to-CAS delay, and row precharge time, respectively.
Currently the decision is between the Micron/Crucial 333MHz CL=2.5 for $63, the Kingston 370MHz 2-3-3 for $98, or the Corsair 333MHz 2-3-3 for $100.
The Kingston is guaranteed to work at 2-3-3 at 370MHz, but the Corsairs have brand recognition. I would pass on the Crucial since they only do CL2.5. Keep in mind that if you only need PC2100 DDR, there is a good chance the Crucial will do CL2 at 266MHz.