Well at least there's something good that's come of this year's impending Paddy's Day madness:
Book of Kells online
I don't know if it's because I'm on a mac (or just because my poor mac is old and decrepit) but the website seems a wee bit buggy (the scrolling down is a little hit and miss for me). There's and iPad app you can download, though, which seems pretty neat and has added commentary on it:
Book of Kells app
Alas, I'm skint so I haven't tried it out but if I ever do have €11.99 going spare I'm certainly tempted!