Zephyr by chpwn has been updated to version 1.0.1 to add a few enhancements and fix a few existing bugs. Among the changes are fixes to disable multitasking gestures within apps such as Cut the Rope or Words with Friends where you may not want gestures to be active.
For those not familiar, Zephyr adds multitasking gestures to the iPhone similar to those found on the iPad. It registers bezel to screen swipes to allow a much easier way to multitask and switch between apps than the options you are given stock. If you're jailbroken, you can pick up Zephyr from Cydia for $2.99. You can check out all the changes and enhancements to Zephyr via the Pastie link below.