the ability to execute XPAT queries via the mIRC DLL would allow for all sorts of interesting scripting possibilites, from something that simply checks filecounts to see if a release has finished, to a full-on NZB DCC bot, if the DLL could take XPAT queries and return the results in an easy-for-mIRC format, it wouldn't be that difficult. maybe some kind of a tokenized INI file.
