I noticed that a keyboard driver was being tested at the end of December. At least one, called KeyPro, is now available from
http://www.mymobilegear.com/AndroidKBDriver.php. It uses the SPP (?) protocol and has a tab listing compatible keyboards. As of my last web search a week or two ago, the HID protocol was still not available for the Droid.
At least one keyboard, the Universal, is advertised as being available and specifically Droid compatible. Info, including a description so hurriedly prepared it refers to Blackberry instead of Droid in the text, may be found at
MOTOROLA DROID A855 BLUETOOTH PHONE KEYPAD KEYBOARD [DROID UNIVERSAL KEYPAD] - $99.95 : Cellular Accessories, Unlocked GSM Phone, Bluetooth Wireless and More, | MBHWireless.com!. I assume it is available from other sources as well.
If anyone has any experience with the driver program or the keyboard, I'd appreciate a post. Thanks!