The Tricklesaver does two things: detect when your TV is off, and cuts off power to whatever console is plugged in so it doesn't waste power when "off". This is good, in theory.
In theory, a standby PS3 uses about $250 a year when in the off standby position. An Xbox 360 uses a little bit less than that. Both those consoles use a little bit of power to maintain the wireless receiver (and USB charger, if you're charging a controller) while the main power is off. If the Tricklesaver shuts this off when the TV is off, you theoretically won't be able to charge your controllers or turn on your console wirelessly.
The solution is to just turn on your TV before you activate your console. But there's not much you can do about that controller charging. It's also $35, which is kind of steep for something that only has space for one TV and one console. [PR Web via Go nintendo via Oh Gizmo]
Update: Reader Jonathan notes that the PS3 uses only 2 watts in standby, and if you're to calculate that out, that's only about $5 a year. Not quite $250.