Get a case/bumper :)
don't think that'd work out for the front of the device...but even if, I'm not a fan of cases at all, why should I buy a many-hundreds-of-dollars/euros-device and than put it into a case for a few dollars/euros? My old phon...
So, how did you resolve the issue with the storage now?
I'm using MIUI too and it runs rock solid for me since months. Next time I will switch, I will switch to a new phone... :p
well, since my new Transformer Prime is now my primary mobile ...