I use the TimeLine macro in the intranet Snip Snap instance at my company. I've made some modifications to it, which I thought might be valuable to other people. A new version of TimeLine.java is attached to the description of my [flipjetiel/TimeLine implementation]. 

On a different note, I had a hard time building the macro, once I figured it out, I wrote a quick couple of notes on how I ended up compiling and jarring it etc. If anyone is interested, I can post it here.