Marceline
Jedi Guardian
Speaking of post merging, I think it needs a little tweaking. It's not actually possible to reserve extra posts after your original post in a thread because the posts just merge together. Someone who's name I forget brought this up in IRC a while back.
That's why I asked - users shops are really popular, and you have to force everything into the first post. It gets very cluttered. Unless you put "[DO NOT POST]" into the thread's title, you'd still have to wait a while to get those reserved posts in and actually open your store! ): (Like I mentioned, how long are you meant to wait after each post...)