Bukkit

Hey, first of all - great job!!! I've been testing several shop plugins, and none of them could beat the simplicity of this one. I love it.

Anyway, I'd like to suggest 2 improvements:
1. I'm using LWC, and I was wondering if you could add an option (perhaps a setting in a configuration file) to restrict players from linking signs to chests that are not protected by them.
This would force players to lock a chest they want to use as a shop, preventing them from accidentally leaving their chests unprotected.

2. The way the plugin identifies shop signs is not specific enough IMO.
Someone could make a sign with a few numbers, not intending to make a shop, but the plugin would recognize it and alter the text on the sign ("<invalid>").
I think there should be some more specific identifier on the sign - perhaps the shop owner's name enclosed with [ ] or < >, or even better - add a setting in the configuration file, that would let you choose what text (identifier) should be on the 4th line of the sign, so the plugin recognizes it. Of course, the 4th line would change to +++ once the sign is linked.

Do you think any of this is possible? I'd love to hear your opinion!

(Edit) I just thought of one more feature that I'd like to suggest, I hope it's OK I'm using the same ticket :)
3. How about an option to limit the number of shops a player can set? For instance, allow each player have only 3 working shops at a time?