PDO has announced its new TopSkin and Flipp cases for the upcoming iPhone 3G. The TopSkin is a form-fitting silicone case featuring a play-through design that covers the power, volume, and home buttons in a slim layer of silicone, while cut-outs allow for access to the iPhone’s screen, camera, ring/vibrate switch, speakers, and microphone. The device’s Dock Connector and headphone jack are covered by flaps that can be opened for access and protect the ports when not in use. In addition, the TopSkin features a micro texture grip on all four sides, and includes a slim-profile belt clip and a full frontal screen protector. PDO’s TopSkin for iPhone 3G will sell for $20 and will be available in black, blue, pink, and white in July.

The PDO Flipp for iPhone 3G is a premium black leather flip-style case featuring a flip-up front cover with magnetic close, and cut-out access to all ports and controls. It also features an integrated belt clip and includes a full frontal screen protector. The PDO Flipp Leather Case for iPhone 3G will sell for $30 and is expected to ship in July. Lastly, PDO announced its Screen Protector sets for iPhone 3G. The screen protectors are precision cut to cover the entire front face of the iPhone 3G except for the home button and speaker. PDO’s Screen Protectors for iPhone 3G will come in packs of two and will be available in early July for $10.