Sonim's existing XP2 wasn't quite rugged enough for you... well, first of all, we're curious what exactly it is that you do for a living. Secondly, though, you might want to take a look at the just-announced XP1300 Core, allegedly the world's first GSM handset to receive an IP-68 rating for submersion to two meters of liquid for up to 30 minutes -- a feat Sonim calls "a breakthrough in waterproofing technology." It's got a media player, but that's just about the only creature comfort you're going to find on a phone whose death-proof shell is fashioned from a hardened rubber and fiberglass mix. Naturally, the 2-inch display uses Gorilla Glass... and realistically, the phone itself could probably be used by actual gorillas without missing a beat. It ships next month for $399 unsubsidized in your choice of black or yellow.
Update: We just saw it for ourselves briefly at CTIA West, and the phone's durable all right -- Sonim brought a six-foot deep tube filled with water and a giant rock to the show especially for us to test it out. When we dropped it onto the boulder from head height, it just bounced right off, and then the company had us call an XP1300 while it was still submerged.