I haven't but look forward to trying one out sometime. I am so used to the on screen keyboard that I am not sure that going back to a physical keyboard will actually be any better.
Let's add another three inches in length, pretty much kills one handed texting, plus eliminates any 3 party cases and accessories, and looks hideous ... ooooo where do I sign up for one of theses!
No interest at all. Plus, how do you even work the home button? Isn't it covered by the case/keyboard? I'll pass on this one...not necessary for me at all.