One other good song identifying utility is Tunatic. Just place a microphone in front of the speaker playing the tune and usually it'll identify it within ~10 seconds if it has the song. It works pretty well, as I had a very crackly recording of a song and it identified it.
If you would like to post the short sample on this forum, just put it in a zip file and attach it to your post. To anyone who wishes to listen to it, they just open the attachment and play the MP3 inside. Quite simple. For other forums (outside of MyCE), you will need to check what attachments they allow.
Unfortunately, pretty much all file hosting services don't allow hosting of MP3s, mainly due to copyright issues. Those that do will probably have some annoying advertisement/capcha process one needs to go through before they can play the tune, so not really worth the hassle.