It's been a while since I've done one of these.
Etsy has released the new beta version of Treasury East which lets you make unlimited treasuries that don't expire.
Craftopolis has made some very cool changes to the site. Including optional integration with google analytics.
Here's an article on how to make your product names Google friendly.
If you want something to listen to while you work I suggest the following craft related podcasts that I like: CraftyPod, Craftcast, Craft Sanity, and Hello Craft (there are many more great podcasts about craft and art topics including specific categories like knitting, most of them can be found on iTunes).
I just received a copy of Handmade Marketplace from Amazon. I'll have a review probably next week.