Yea... it use to be that there were only a few options.... (i.e. Smart Strip)
I think that with the renewed interest [in the US] in being "Green", we're going to see more of these around. I saw one made by <I think that it was APC> on sale for $25 at a local office supply store. It had 4 switched outlets that turned on via power being drawn from the master outlet.
I recently picked up a "smart strip" made by Phillips.... $24 at Walmart.