Yeah, I believe they eliminated the unlimited plan earlier this year. If you had it, you kept it, but no new subscriptions.
VZ and ATT have not offered unlimited aircard/MiFi for a LONG time now. What got eliminated earlier this year was unlimited cellphone data.
Sprint had unlimited MiFi/aircard until very recently; that's now gone, too (but old users were grandfathered in - I still have a Sprint unlimited aircard, though their service is slower & less reliable than the others).
Clear Wireless (WiMax) still has unlimited at a good price if you're in their coverage area (Dave's not in their coverage area....).
There is a company called BroadbandBlue that supposedly serves that part of Texas. Don't know anything about them.
The other option - and I don't know whether it's available in Dave's area - is a microwave-based broadband service (uses the old ITFS frequencies). An example is VisualLink, which is located in Winchester, VA (and serves Winchester and surrounding rural areas). Good service, reliable, etc. There may be a similar company near Dave.... I just don't know.
As for the DSLAM issue, when I lived in San Antonio, I initially had a CLEC providing internet service; DSLAM was co-located with SBC's switch and used SBC's lines to house. I had nothing but trouble with the last-mile and finally gave up and went to SBC for internet service. The service was better (they pulled new subscriber drop for me), but I still called them about once a month with issues. In the end, I had the phone number for the local tech supervisor. (Not that Time Warner was much better according to neighbors....)
EDIT: Big Bend telecommunications (
www.bigbend.net) supposedly serves Alpine with wireless broadband - dave, you might want to see if they can serve up where you live.