I have a little bit older SparkFun Bus Pirate. Got it during free day last year or so. I don't know if it's been added, but can you make the clock work in UART mode? I know most things these days don't use it but I could really use in a project I'm working on with an older device (80's early 90's) that requires the clock to see the bytes that I'm sending to it. So, clock on TX would be awesome. I can RX just fine without it, and I've been throwing all kinds of data at this thing with no success so far. If I use the device that's suppose to be plugged in there it clocks when it TX and it works fine.