Hi again.
So I have had a go at gathering some temperature data, and storing them on ThingSpeak.
Works great, so far... (except that for some reason, it stopped logging at 04:00 this morning)... anyway. 
If the developers over at ThingSpeak are listening in, I have a feature request:
Add a display, that will only show the latest reading from the chart/field. -and display it as a number in a little neat box (no graph).
That way, for any stored data on ThingSpeak, it would be possible to see the historical data, and also the most current value.
The same idea for digital values: make a text display, where you can assign some text for each value. Example: 0 = off / 1 = on etc...
That way it would be really easy to build up a webpage, and include all the info from ThingSpeak, to show current and historical status of whatever is monitored.
Nice service by the way 8)