To merely say that we're unenthusiastic about Cygnett's lineup of iPhone 4 cases would be accurate but insufficient to explain our continued distaste for generic OEM products, so here goes: Cygnett's Lavish ($30) and Glam ($30) cases offer cheap-looking perforated lambskin and patent leather bodies with the inconvenient flip-style designs we've avoided for years, here with poor volume button protectors and plain holes for all of iPhone 4's other features.…