I just ran across something new in the Horizon summer 2008 catalog:
http://www.horizonhobby.com/Products...ProdID=EFL2725
The Apprentice is a 4-channel electric RTF trainer package with a brushless power system and a Spektrum DX5e radio system all for $299.99 suggested street price. It's not too small, either, boasting a 58" wingspan (the Hobbico Avistar has a 59" span).
This might be a really good choice for student pilots who'd prefer electric. At $299, however, it's not exactly a bargain considering that it's an all-foam airframe. This will be interesting to see.