Actually it was a couple weeks ago, but I wanted to make sure I was going to keep all of it before I posted.
It's a Graphtech Ghost system running into a Roland GI-20 into my MacBook Pro with GarageBand, running stock instruments, EZ Drummer, and soon SampleTank 2.5L.
Simply put, this is an unbelievably cool setup, and the flexibility is positively insane. I can finally put to disk all that I've ever imagined in my music, easily, quickly, and stable as a rock. Tracking is great, and it's actually too accurate; it forces you to play better because it picks up everything! You can tame the sensitivity down, but I actually prefer it this way, because tapping with grand piano is quite fun.
It wasn't cheap; I bought everything new, so I paid around $850 for everything. But it's been a dream of mine ever since I was 15 and played the Roland GR-1/GK2 combo at a Chicago GC all those years ago.
Besides the durability of a floor unit and ease of use for live playing, I can't imagine why anyone would rather go with a GR unit instead of the GI--->computer. For studio use, the GI/computer combo is absolutely the way to go.
Since you're keeping it, are you going to come up with a more permanent piezo install (like drilling the bridge plate)?