Hot on the heels of Honeycomb 3.1 and its USB hosting capabilities, Samsung's US site has just listed a $20 USB adapter for the Galaxy Tab 10.1. The stubby add-on won't do anything for your Tab's slender figure, but it will convert the Apple-esque 30-pin connector into full USB and thereby open up a world of connectivity to "keyboards, mice, thumb drives" and potentially any other USB device that gets Android support. Unfortunately, the adapter is out of stock and listed as "back order", but after waiting this long for USB hosting on Android tab
