2.6.11 (well actually 2.6.12-rc3) works on the c7x0 machines, work is well underway to port it to the other devices - have a look at the status pages on openzaurus.org
There are two zimages, depending on whether you have a PXA250 or PXA255 processor (cat /proc/cpuinfo). There are 3 initrd.bins, depending on whether you want GPE, Opie or a bootstrap (no GUI) setup.
Si