Been watching this for about 6 months now with the price not budging below this so figure its worthy of a post, Shoot me down if not, camelx3 was playing up on me when I tried to check price history.
Looks like all of the Broadlink IR devices are at a discount at the moment
If you don't need the sensor then this one would be a more suitable option
I plan on using mine with the included sensor to monitor and remotely control my A/C - Climatise the house before I get home from work and the rest, supposedly it can be used for pretty much anything that takes IR controls. Alternatively this will not work if your A/C system doesn't use IR - if you have a wall control panel and not a remote this likely wont work for you.
Not a bad idea. Much cheaper than the WiFi adapter I bought for my aircon