Athlon XP (Thoroughbred) is supposed to debut at 1.93GHz (2400+) somewhere in the timeframe of April-June (AMD says T-bred shipments are supposed to take place during this quarter (which likely means shipments in March sometime)). A 1.8GHz 2200+ Athlon XP (non-T-bred) is supposed to come out between now and the end of March.
At worst, you'll see a 1.93GHz T-bred on May 20th, which is when Intel is supposed to announce their 2.26 and 2.4GHz P4's, which will support the 533MHz FSB spec....