Hi guys,
This is a feature I'd love it get in (and actually tried once), but as always (it seems) it comes down to a cross-device issue. For example, with the ff/rw keys, on the pearl the first press is 'o', but the second press is 'p', then the third press is 'o'... Makes it difficult to allow a user to, for example, press a key to map to function X. It's not a deal breaker, just makes it a bit more complicated that I'd like it to be, and will take lots of work and testing to make it work on every device.
It's definitely on my list and will make it, but it may be a while
-Marcus