Changes from previous releases are at ftp://hyper.stanford.edu/pub/pcmcia/CHANGES.
Memory card support has been rewritten for this release: the functionality of the old pcmem_cs driver has been merged into the memory_cs driver, and pcmem_cs has been removed. If you used the pcmem_cs driver in the past, check the instructions in the PCMCIA-HOWTO and the memory_cs man page to see how to use the new driver.
The 2.9.8 drivers should restore clean compiles with 1.2.13 kernels, as well as compiling against the latest 2.1.* development kernels.
Other significant changes include updates for the Xircom Netwave and ethernet drivers, and new support for the Motorola Mariner cards.