I have just completed the update to the theme on jacktams.co.uk, I am now running the latest version of K2 and Unsleepable with my mods on top.
And as you will probably see as you browse around there is some nice AJAX improvements that K2 brings to WordPress. I am still working on some finishing touches but I am very pleased with the new theme since I now have got it to work by deleting all the K2 records from the options database.