I really like the substitution feature. The %+ for example is useful for websites.
But I'd like to be able to have other delimiters. For example, when using the call skype startlet (uploaded to your downloads section), you can call multiple users by separating the name with semicolons.
How's this for proposed syntax?
%{;} - all parameters separated by ;'s
Also, in the future, might be nice to have some "Macros" for substitution parameters. For example:
%*{urlencode:&} - All parameters, separated by "&" and each urlencoded. (I'm betting you'll come up with a much better syntax).