In the latest DDOCast Geoff Hanna from DDOGamer reports that he was told that there would be no new Eberron content until the Forgotten Realms content reaches a 'critical mass.' There may be some continued 'epification' of Eberron content, but the priority is Forgotten Realms for the foreseeable future.
He also reported that Turbine (Tolero) has finally confirmed that making quests soloable is definitely a design goal. An example is the change to Gianthold Tor to allow it to be soloable.
Personally I'm glad they are going this direction, as I like the FR setting in DDO, but I know some folks love the Eberron setting, and this confirms what many of us suspected: Eberron is definitely going to be on the back burner.