I've seen some pretty ambitious amateur rigs for outside solutions... including a guy putting the Motorola modem in a big plastic trash can on a pole above his house
I wouldn't do that but I would consider it if my only other option was dialup.
Edit: BTW... its not just the horrible signal, their coverage maps are total BS. Despite the big green SOLID blob of coverage on their website for DFW, I have attempted to get Clear service on 5 (not kidding) different locations all over metro DFW for various construction jobsites and NONE had coverage. The coverage is full of holes. I'm batting 0 for 5 in attempts to get coverage in a supposed "covered" region.