I have created this thread for people to request items for inclusion.
It helps if you can include a 16x16 pixel GIF or PNG image. Transparencies are OK, animations are not

Vijitha Kumara already requested this (and provided some sample icons), so this is in the hopper.

I've deleted your other topic since it was effectively the same as your request here.

I don't want to appear impatient, I'm curious about the process of how bumper stickers are accepted and added to the pool. Is it like a periodic event, when they get added along with other improvements to the forum?

I can tell you exactly: we don't have one.
I chose the initial ones more or less by whim and added a few based on input from other staff.
To my knowledge it has not been updated since then but I can't be sure.

If nothing happens I'll gather the requested items, throw them at the staff to see if there are objections and then assemble them for addition.
It isn't a difficult process (just the image and a DB update) but it should be done during a site update and not something I have direct access to.

Thanks!