“Chameleon – A Better Home Screen for your Android Tablet” is a Kick Starter project that changes your homescreen depending on your location, time of day, and other factors. This home screen replacement will be available on the Google Play store in September if it earns enough from the backers on Kick Starter. If you pledge $5, then you will get it a month early in August. I presume that the app will cost at least $5 at launch too, so this could be a good way to go. Personally, I am going to wait until it is released on the Google Play Store.
Overclocked kernels will increase the clockspeed on the tablet above what it is set to by default. For the Galaxy Tab 2 7.0 that is two cores at 1 GHz each. The overclocked kernel can boost them up to over 1.3 GHz. This is still in development and might cause crashes, so make sure do make a backup in ClockworkMod before attempting to flash this kernel.