Upgraded my phone to the new JPK 2.2 firmware yesterday. Was good timing, since that release came out the day I was going to flash to the slightly older JPH, which had a few bad bugs. The JPK release feels extremely close to a release version everyone, its running very smooth, and I haven't had any problems yet. Enjoying Chrome to Phone (well, actually Fox To Phone), and Flash immensely, protected apps show in the Market (think Angry Birds), the new Gmail application is interesting too, the Music Player is finally perfect (no more crashes when trying to arrange by Artist), and the icing on the cake is the BT keyboard and mouse support (rather fortuitously my BT mouse also arrived in the post yesterday). I haven't yet tried the GPS, but people are reporting much improved performance (I've never had problems on any firmware, go figure). Samsung have kept their flawed RFS file system in place here, but despite 14 hours uptime now the lags haven't yet started, so whatever they've done for lagfixing is at least somewhat effective. Unfortunately Voodoo lagfix isn't available for 2.2 yet, but if I do have problems the One Click Lagfix is available.