I wish we had 24x7 HD RSNs more than anything today, but I'm not sure how they could pull it off in that timeframe.
E*14 is launching in March, so the soonest it would be available to start taking on programming is April. That's going to the 119° orbital location where Dish can already only use transponders 1-21 (22 - 32 are owned by D* at that orbital location). Dish also is limited in transponder space on 110° due to D* holding some of the transponder licenses there.
Dish still has issues at the 61.5° orbital location and needs a replacement for the failing E*3 and crippled E*12 currently on station. This is where AMC-14 was going to go before it failed to reach orbit; E*15 is going to be the replacement for AMC-14 but it's not going to launch until the end of 2010. The launch of E*14 might free up a bird to be parked at 61.5° to add some additional programming in the short term -- but Dish didn't move E*6 from 72.7° after Nimiq 5 got on station to take over so I'm not sure what they are planning on doing there.
As I see it, Dish has a couple options to get to full-time RSNs:
1) Get full transponder capacity at 61.5° so that it can mirror 129° for HD coverage.
2) Change the modulation on the 110°/119° transponders to get more bandwidth, requiring receiver swaps for all the Dish receivers not able to do 8PSK. They can then use their transponder space at 72.7° & 77° to mirror that content to get the RSNs up to full time HD.
I just don't see either of those options happening in 3-6 months.