iOS 4.1.1 is looming near! The update is set to fix a daylight savings bug in iOSí alarm clock app that causes alarms to sound an hour early. The update is also set to patch comexí untethering hack which is used by Geohotís Limera1n jailbreaking tool for iOS 4.1.
You are advised to save your SHSH blobs so that you can downgrade iOS to a previous firmware version. Cydia does this automatically but itís best to use TinyUmbrella. Better to be safe than sorry!