We also use Netflix with the stand alone player, $115 inc shipping, it works VERY well, and we only have 1.5 Mbps (all we can get).
They have tv programming, such as 30 Rock, Heroes, a day after they're on regular tv.
The Netflix Player by Roku | Watch Over 12,000 Netflix Titles Instantly on your TV
I've tried a few on my laptop, my only complaint is that it automatically analysis my connection with no option for higher quality. I'm on about 1.5-2mb/sec so the movie starts within seconds but the quality is not the best. I would rather have the option of waiting 5-10 minutes for a higher quality feed to stream.