I finally got myself a wattmeter

I've bought it for 26€ on AKI. It measures:

• tension (V)
• current (A)
• power (W)
• work (kW/h)
• cost
  

I just tried it on the remainings of my datacenter. And here are the first results (as informal averages):

• Celeron 2400: 100 110W

• 600VA UPS: 75 30W (oops...)

• Wireless Router + ADSL Modem: 25 18W (arghh, 2 separate sets... must combine them to save power)

• 17' TFT: 15W

• Wireless Phone: 3 4W

My next readings will be over:

• my chargers room (as a good geek, I have a bunch of gadgets who love sucking up power) ;
  
• on the equipments I usually standby;
• my battery chargers;
  
• on my laptops (particularly on my laptop disconnected chargers);
• and finally on the fridge.

[update] I'm paying something like 0,12€ per kW/h , so we're talking about 15€ / month. To save energy, I will:

• continue to move servers from my silly datacenter into hosting infrastructure;
• disconnect my UPS;
• continue to disconnect standbys;