I put a pumpkin in it but I don't know where to see it at.

You can get to in through your profile if you have the Extra Info box on there. Here is your collection

You can see it here; http://www.subeta.net/explore/collection_pumpkin.php

You get here/there by (interact/explore)map-shadowglen-pumpkin collections

as I'm ninjaed no doubt

Thank you! Is there a list anywhere that lists all the pumpkins available?

No but you can visit peoples collections to see them here is my full collection; http://www.subeta.net/explore/collection_pumpkin.php?act=view&user=199467

Or I think you can go to subetahq.com or subetalodge.org and type in carved pumpkin in search and also find them that way :)

Thank you!