Well you've already achieved page 3 on Google for your request, (4dat in quotes) that's fast work for a posting that's only 20 minutes old. Seriously though, I quite like very short domains with a numeral attached (no I'm not buying - just selling) and have had some success. There's obviously some interest but it's probably only going to be from someone already using the combination.
I don't recommend paying for any sort of promotion of this domain. It isn't strong enough and It wont help. my advice would be just to list it on Sedo or Dan for $500 and forget about it. The term is being used so you may get lucky