What have you used Ardour for?
What Ardour is really about is music. It is meant for people to produce tunes with. Dazzle people with your sense of melody, synth wizardry, songwriting, beautiful voice and gorgeous production (and make Ardour look good in the progress!).
It's a good idea to include some information on how the song was made as well as the link to the song. People will be interested in where you recorded the live parts, which effects you used (in general - we're not trying to steal your production secrets) and software you used: sequencers, synths, soundfonts, etc.
If you're willing and able, why not post complete ardour sessions for others to study?