RIM's PlayBook tablet has been a disaster.

It shipped without email -- the one feature RIM's BlackBerry phones is known for -- and. Sales have been so bad that RIM cut the price to as low as $200, down from its starting price of $499.

But now, RIM has apparently decided that the thing that's really missing is an attachable keyboard for people to type email. Hence, the company announced one this morning.

It costs $120. That's 60% of the price of a 16GB PlayBook.

Talk about throwing good money after bad....

Here's a video that RIM made for it. See if it convinces you.

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