If you have followed E* announcements in the past you will note nothing is etched in stone. However, with the push to beat D* in the HD numbers game anything is possible. With the new prime-time viewing season starting, both E* and D* would love to be able to announce more channels, be they SD or HD, to lure customers away from cable or each other. Time will tell.
P.S. I have only been waiting for Indy HD locals from E* since March of 2006, when Charlie announced they were "coming soon", but I gave up about a year ago and got an OTA antenna which works great.