I'd was initially excited about the Flashback, until they said it only came with about 20 games. Hell, I can go buy one of those joysticks that has about that many games in it for $20.
True... I thought it was originally offered with 30 games. Either way, you could get a real Atari 2600 + 20 somewhat common games for not much more than the Flashback:http://www.4jays.com/atari2600.11.html
Scroll down to the Junior Special Package... It's $70, but I'm sure you could find a similar lot on ebay for less. I'd rather have that anyway - there's just something about playing the real thing.