The hardware is made by Motorola however there will be other manufacturers coming out with receivers soon. There is no PVR yet, however it is in development, but I would not expect to see it this year. When it does come out it will be really cool.
Don't quote me on this, but I would expect the free promo to extend through September, if not indefinitely.
At this point you should look and see what you will loose with only having Voom: no pay per view, limited sports (no Sunday Ticket, NBA league pass, etc.) and a few popular SD channels are missing, which should fill in soon.
I talked to a few people on here who either just got it, it would be nice to hear from them. I should have my demo in a week or so.
There is a good comparison of all the available HD channels and who has them at http://www.orlandodigital.tv/HD_Reception.htm