Tablets and mobile devices don't factor into my thinking I'm afraid.
Apart from the fact that I don't do any mobile browsing, if I was to try and fit the design to every single device available, I would never have time to sleep, eat or anything else.
All I've basically done is remove superfluous borders and margins, in some places I've actually increased the white space.
A dedicated mobile style is being created by the developers, so that will be the best option for mobile browsing.
Edit: Sorry, that sounds a bit flippant. What I meant to say was without being able to check the results as I don't have any mobile capable devices, it's difficult to know how to factor the design changes into that. The developers will spend far longer testing the dedicated mobile style so it will be far better suited than anything I could ever do, which is primarily designed to work on a desktop.