That'd be iHome (you can find it on Androlib, so presumably on the market too). The launcher looks awfully ugly, though, and according to the comments it chain force-closes and has horrible performance, but hey.
Why not go for the top-of-the-line phones and get the N1? The Hero is nice and all, but it's over half a year old now, and really the screen's rather tiny. The N1 should be available to Verizon toward the end of March, so getting the Hero now seems like a terrible waste. It's got flash, blah...