I got one from Amazon before Xmas for my 2215. Think I paid $33.
It nice to use, can't touch type, but can quickly "look type". I keep pressing the P instead of the Delete key, that is my problem. Also to access the number and symbols, I keep forgetting if I have to press the blue or orange button.
Would not be without it though, makes my horrid bus commute productive as I use it to write updates for my blog to upload later. (GPRS on the bus would be cool, but too expensive
)
Colin