Many people belong to teams, I myself belong to Craft Pimp and Bead Smitten but admit I find the treasuries a bit too time consuming to create myself. I do my best to promote them on Facebook though.
Occasionally I get an email from someone who has chosen to put one of my items in their treasury which is always a lovely surprise. Here are a few of the ones I have had items in lately, you will notice a distinct autumnal theme.
If you click on the image it will take you to the treasury.