Text messaging capable phones are great, but in general, they are fragile.
To get around this problem,
I got an Otter Box case for my PDA/Cell phone. I recommend it highly.
http://www.otterbox.com/products/pda_cases/palm_treo_case/With the some minor tweaking to improve sound quality through the case, I think these are a great products.
While the Otter Box may seem expensive, I think it is a bargain compared to the cost to repair, replace or be without your phone for a few days if you accidentally drop it.
The case does, however, make for a bulkier package. IMO, the extra protection is worth additional bulk.