The Palm OS version of Crosswords allows you to place tiles simply by typing letters on your device's physical keyboard. To place a specific tile from your rack onto the selected square on the board, you simply press the corresponding letter on your keyboard.
It might be nice if the Android version of Crosswords could support the same feature. It would be useful in at least two types of situations:
(Personally, I do own an Android device with a physical keyboard: a Samsung Galaxy S Relay 4G. Unfortunately, it's a landscape keyboard. Because Crosswords doesn't support landscape mode, keyboard support wouldn't be something I'd really benefit from.)