Some are reporting that it wipes your device clean, while others say it leaves all apps intact. A wipe would make sense, however, due to the nature of the upgrade. Another issue being pointed out is the lower screen resolution (WVGA 800x480) is a little claustrophobic on Honeycomb. We're still digging around for further information since it's not been conirmed whether this is a limited regional roll-out or not. If you got the update, leave some comments and let us know.