Samsung released an update for the Wi-Fi only version of the Galaxy Tab 10.1 earlier today, bringing the tablet up to Android version 3.2. That would normally be cause for celebration, however this particular update has been fraught with bugs and problems for many users. The first and most important is Wi-Fi itself, which may be rendered inoperable unless you set a static IP address in your settings. There have been other issues, including broken auto-rotation and even some failed installs that can't be fixed with a hard reset.
For the time being, the update doesn't seem to be available for OTA download on the tablet itself, though if you're feeling like taking the risk there are still reports at XDA-Developers that it can be downloaded and installed via Samsung's Kies desktop app. We obviously recommend you stay away until Samsung can work out the kinks.
Update: Samsung issued a statement to Phandroid confirming that it is "aware of an issue" and has ceased distributing the update.