Had mine overclocked for about a week now, with Letho's 125-800mhz file. Battery drains quite fast to be honest, it is rather annoying, going to reflash to stock.

Edit:

It is quicker, flash videos only stutter in the first 10 seconds then stablise to fast, that's in browser, when before it used to be so stuttery and even in full screen it was shitty, so that's a plus point I suppose, it would be nice to be able to set the max processor speeds, I'm guessing that's already been done as this post has been out for a little while now, but until I can be botherd to search through it atm lol.

It's really simple to flash too, which was a plus

Ryan