I love how any product that looks good, needs protectors to remain that way. Ones that don't look quite as nice, generally stay that way no matter what.
For example, as mentioned here, PSP's and Ipods. Who doesn't have their Ipod in some sort of fugly case. And if they don't...it usually looks like ass after a while.
Anyway, OP I would look into screen protectors for PDA's and use one of those.