Was just thinking today that an iron-on patch would be awesome. Usagi's clan crest, the chop logo, or Usagi himself would be cool and patches are relatively cheap to manufacture and don't take up much space, making them easy to transport to conventions. I got the idea after looking at some Hellboy/BPRD patches. I wish there was a patch of the actual Hellboy character (there was a BSA jamboree patch, but those are limited, expensive, and have all the jamboree text on them).

- Hellboy patches.jpg (49.53 KiB) Viewed 8538 times
Also, while I was at a convention the other week, I asked about prints and the feedback I got was that doing a limited print run is a good way to go. Signed would be cool, but at the very least numbered. Just numbering would be a good way to not take up Stan's work time since someone else can number them. Besides, he can sign them on a one by one basis at conventions. Another way to keep them limited without numbering is to have a couple prints that are just made available for that year. I believe Mike Mignola does it this way, where he introduces a couple limited prints near the beginning of the year and at the end of the year they are discontinued. He then makes a couple new prints for the next year. By doing this, he only has to carry a few different prints at a time (no big back catalog of prints to manage), creates a scarcity which drives sales (if you want the print, you better get it now because it won't be around at next year's convention), and also keeps the inventory fresh by having all new material each year.
Lastly, I'd like to see a book of the sketchbooks all collected together. Those first few are really hard to find.