Bukkit

Some way to prompt the user for input when running commands bound to a sign. So far this is the only thing I've encountered that CommandSigns lacks, and it's pretty disappointing at times...

The prompt should be customizable, so users don't see a generic, unhelpful message.

Something along the lines of...
/cmds 1 /give <player> diamond <prompt#How many diamonds would you like? #1>

Use # # instead of just one #, though, to reduce formatting frustrations (like the one I have here on bukkit, that turns # # into ##this##)

Basically, the command above would add /give <player> diamond to a CommandSign, then ask them for a single parameter input with the prompt of "How many diamonds would you like? "
The # would separate the Prompt and the number of parameters required for the prompt. Failure to enter the proper amount would/could cancel the command sequence.