The DC area has a 20 degree LOS for the 129, and it gets lower as you go northeast. Didn't Scott manage to get it in Conn? Also, I've nailed the 148 out here at 6 degrees, but this was at the top of a 3000 foot mountain(or hill as Simon would call it) with no trees in the way. Also, our friends in Alaska and PR are getting signals with larger dishes at 10 degree angles.
As for the DC DMA, due to the fact that it is the 6th largest, I would imagine that it would get moved to the 110 one E* 10 goes up with the rest of the top 15 DMAs. Also, this 129 could be a stopgap, and they may move channels off the 110 and 119 to the 129 to free up space on the them and to get the entire DMAs on the same location to be fully compliant with the FCC rules. They would have to wait until all the subs in thse DMAs have D1000s tho. Also, when E*10 goes up, they may move some sats around and move one of the smaller spot beam sats to the 129. Say move one from the 110 to the 119 and then 1 from the 119 to the 129 and start reusing more of the space. Remember, E* only has a lease on 16 of the transponders after 2008 or 2009 unless they can get the FCC to allow them the use of all of them.