Samsung's OTA update for the Galaxy Tab 10.1 has gone live, with the 188MB software now being offered to users of the Honeycomb slate. The new firmware brings with it Samsung's own TouchWiz UI for tablets, upgrading the home screen with various new panes and a compact task-launcher for common apps.
There's also a version of Swype for tablets along for the ride, together with mobile printing and several enterprise features to try to encourage businesses to consider the Tab 10.1 too. Full details of what's in the update are here.
It's worth noting, however, that once you've installed the update you won't be able to remove it. Samsung has confirmed that it's a permanent thing, with no roll-back option, so if you're not sure whether you'd prefer to keep the stock Honeycomb UI - or are wary of potential bugs - then you might want to hold off until the first bug reports come in. Everyone else, hit that Update button in the Galaxy Tab 10.1's settings page to get the new firmware.