Not too bad as yet, but you can see how in a few years it will be overrun. Its still pretty quiet in Kefalonia and the bit thats supposed to be the big tourist destination is tiny. People really friendly and food very nice, although not as cheap as you might expect but apparently thats the fault of the Euro.
There looks to be loads of pocketed limestone cliffs all over the island and I have found nothing on the Net about any climbing there. Betting that someones had a look in the past though. Much of it looks loose and chossy, but there some stuff with potential.