I spoke too soon, or actually a little too late. Robert Simpson at Phoenix Software Solutions politely reminded me that their SQLite ADO.NET provider also supports the ADO.NET Entity Framework. For more information, see the Phoenix Software site at:
In fact, the initial build of the SQLite provider that supported the RTM version of the Entity Framework was available the same day that the Entity Framework released.
Congratulations to Robert, to Phoenix Software Solutions and to SQLite!
ADO.NET Program Manager