A company called CleverWraps has an interesting product (actually a series of products) called RingerWraps, which is/are made to protect your device from the wet weather. Additionally, these can also be used to safeguard your beloved gadgets from harmful elements like sand and other corrosive materials.
Made of high-grade poly, RingerWraps are designed as disposable sleeves that feature a zip closure and re-sealable tape for double protection and a custom fit for pretty much any kind of phone or PDA. While protected, you can still use full phone functionality, even if you have a touchscreen-equipped device.
RingerWraps are available in three sizes — small, medium and large — made for candybar, clamshell and bigger side-slider devices, respectively. A pack of 5 sleeves costs $10 bucks which is like nothing compared to what could happen if you find yourself on a rainy day. You can grab RingerWraps from CleverWraps’ website. But before clicking on that link, check out a short video demoing these sleeves in action.