EAP types define how 802.1X transaction are conducted with what credentials and encryption: The Wi-Fi Alliance has added EAP-TTLS/MSCHAPv2, PEAPv0/EAP-MSCHAPv2, PEAPv1/EAP-GTC, and EAP-SIM. EAP-TLS has been a part of the certification testing since WPA was introduced because, as one alliance member explained to me, you couldn't test all of WPA without having at least one secured EAP type involved so that 802.1X could be tested in a reasonable manner. Devicescape and Meetinghouse supplicants join Funk and Microsoft clients in the testbed. These several types represent most of the secure EAP in use.
Interestingly, this article says that WPA2 was released in Sept. 2004. I know that certified devices have slowly been hitting the market and mandatory inclusion of WPA2 is scheduled for later this year. I was dealing with a new baby in September and so I somehow missed this and subsequent WPA2 announcements, but so did many of my colleagues.
The press release notes that the alliance has produced a white paper on deploying WPA and WPA2 in the enterprise, which is surely good reading.