I'm actually surprised nobody here knew about it. I just have a Series 1 SA TiVo, but converted a friend. He just bought a HR10-250 off eBay, we hooked it up, and started looking in to hacking it. This was the day after the announcement. He's held off on hacking it because he doesn't want to buy the InstantCake disc for 3.1.5f when 6.3 will be faster and have folders. Something I definitely wish I could have with my SA!