cykey.co.uk is an interesting option - very easy to learn (I did it in an afternoon), but suffers from a couple of shortcomings: 1) there's no dedicated backspa

cykey.co.uk is an interesting option - very easy to learn (I did it in an afternoon), but suffers from a couple of shortcomings: 1) there's no dedicated backspace key; 2) the characters regularly used by programmers are awkward to get at in some cases. Both of these issues could be addressed, and I'm experimenting with my own build which will use two rows of 5 keys, the upper row providing access to key layers + BS. PS. It's also IR, not bluetooth - but thats a trivial DIY fix.