The NC and VA DOT rail departments have been cooperating quite extensively on the development of the SE HSR route and plan. (SC and GA have been non-players until recently.) I gather NCDOT has been taking the lead on the ambitious plan for the Richmond VA (starting just south of the Richmond Main street station) to Petersburg VA to Raleigh NC route. The plan is for much of the route to use the abandoned CSX S-line with major upgrades to operate at 110 mph speeds with curve straitening and for all grade crossing to be closed. If implemented as planned, the travel time from Richmond and DC to Raleigh would be reduced by 2-3 hours. The Tier 2 EIS final document for the Richmond to Raleigh SE HSR section is scheduled to be completed in 2011. Once that is in place, then the next step is to get the billions in funding to build the Richmond to Raleigh section. If you have not seen the extensive reports and maps, they can be found at www.sehsr.org.I think Richmond-Raleigh is a probable improvement a few years down the line, but it's going to require VA and NC to talk to one another because so much of the line is within VA. Actually, I think you're looking at Petersburg-Raleigh being the big gap...Richmond-Petersburg will probably get some marginal improvements in connection with the Richmond-Norfolk service.
If the SE HSR corridor from Richmond to Petersburg to Raleigh to Charlotte NC is built as planned, it will make a daytime WAS to ATL train via that route a logical extension, even if GA does not contribute much to it.