I know several daras that are on Facebook too, though most Thais in general seem to prefer Hi5 because it's more customizeable (and in my opinion, easier to use), not to mention it's in the Thai language. But Facebook was (did?) working on making its interface availible in Thai too, so we'll see if that has an effect on anything.
But I gotta agree with IceBKK, I know several that spend all freaking day and night on the computer cause they only work once or twice a week haha
What sort of experience did you have?