As the only person in that business (at least for Honda hybrids) I can tell you that the demand isn't there yet.From the sounds of it, the battery rebuild business could be the next big thing if we see the continual increased sale of hybrids. Hopefully it will ultimately drive down the costs to rebuild the batteries as well.
That 7 year quote is from me. I'm seeing batteries die at anywhere from 60K to 300K miles with the median being around 170K. Of course, I don't see any that die before the car hits 80K miles because they are under warranty.