Bill gates, is too busy, studying how to interpret the simple idea of taking peoples thoughts and life from them. I doubt he bothers too much with windows 7 home premium slp keys lol.
Where is the problem? It's only about 5 weeks until 22 Oct! Just install your Home Edition, and use it until then. You can easily do the rearm-"trick", so that you can use Win7 without key for 120 days. And i think in these 120 days there will be lots of keys!
Actualy you can use it even without rearms as long as you wish, no reduced functionality since Vista SP1. Just some nice annoying on-screen reminders and black wallpaper, that's all. I predict there will be a lot more slp keys for Home Premium, than for Ultimate after 22/10...