I dropped my 4g Touch and now there's a series of small cracks in the upper left corner (a bit of glass even fell out)! But the good news is that it still works fine. So I don't want to spend $100+ on new glass -- I'd be happy to just make sure it doesn't get worse, because I'm worried about the cracks getting bigger if I don't do something about it. Any suggestions? Is there some sort of superglue-type adhesive to just stop it from cracking anymore, or maybe a screen protector that will hold it together? I need your expert advice -- thanks!