Since you are rooted you may want to consider some of the new custom roms. They have some neat features built into them, one being the ability to overclock up to 1.6, or anywhere in between. The other alternative is to flash some of the new custom kernals which allow overclocking. I'm not a techie type so I can't explain how this works, just know it does.
The new 3.2 update from asus has put a lot of features into the stock rom that the devs were doing in their custom roms. So before you hack, why don't you update to 3.2? It had an initial release and a couple weeks later a patch that had many final fixes built into it- Start there. See if that makes your tab better.
And welcome to the forum!