Should I mention I have a dark brown roof, and I'm in the deeeeep south too?
You have got to check out Icynene.
Cool (literally). I'll check it out.
If you have any links to an access point for that price, post them up. I'm also thinking about getting the new Airport Extreme and moving the current Express upstairs to use as a link with the antenna.
Just search amazon for "pocket router" and you'll get several hits for units starting under $20. As long as it says AP you're good to go. I've used several over the years, including home-made ones from old routers running custom firmwares.
But HD over wifi is still very iffy, IMO. I've tried and failed to get my own video distribution working over wifi. But I had different challenges than you. I ended up going power-line for a time, which would actually be a great option for you. You must have power in the attic already for lights and your future Homerun. A pair of power-line Ethernet adapters is pretty cheap. That'll give you a solid connection and plenty of bandwidth for several HD streams at once.
Its not to save $5 of coax. ...
What I'm trying to save is the effort of running coax through my attic, down walls, and punching more holes through drywall. Why bother, when I can attic mount my antenna, and right next to the antenna I have a 110 2-gang outlet where I can add some gear?
If you want to distribute the broadcast frequencies to more than 2/4 rooms concurrently, you will just have to bite the bullet and run the coax to the rooms that need to tune these broadcasts. The HDHR while nice, is limited to the number of tuners is has and you still need hardwired ethernet wiring for stable bandwidth capable distribution of the MPEG2 TS's, so presumably if you have wiried ethernet in the attic, you should be able to run coax along the same path......?