There are a lot of them out there. I have yet to see one that does not work. You can also look here: http://circuitco.com/support/index.php?title=BeagleBone_Black_Accessories#Keyboards
Gerald
If it is USB. If it works under linux. It should work. I am not in a position to buy all of them and test all of them. If someone else in the community gets one and it works, and they are nice enough to let us know, then I will add it to the list for you.
Gerald