Speck Products has unveiled its new line of cases for the iPhone 4. The lineup includes updated versions of the CandyShell, a hybrid hard plastic and soft rubber case that’s priced at $35, the PixelSkin, a uniquely textured rubberized case that sells for $25, and the Fitted, a two-piece, snap-together hard shell case with a fabric-backed panel priced at $30. In addition, Speck is also offering the new GeoMetric, a TPU case featuring a unique…