If you have any experience in COM you could try to make a snippet that opens your cd-rom drives without using WMP's objects (was one of the first things I did with COM, good learning experience)
Other things:
* If you're any good with sockets, an mirc.com forum checker to see for new posts and give extra information about them like who/when/topic.
* A picwin scripts editor.
* A picwin gui to create picwin dialogs with everything MDX supports.
* A dialog editor similar to Dialog Studio/Editor, but in pure mIRC scripting.
* Learning regex, and by learning I don' t mean just memorizing the syntax, is a challenge on its own. Being able to make optimized regexes that don't match too much, and too little, is a great challenge. One of the pitfalls for people who only know regex so so, is that they make expressions that match what they want, but in more occassions than it should.
I know some of these suggestions sound like big things, but you could have the basis for some of them in one day for sure. Doesn't need to be finished in 2 days, you can work on them over a longer period of time.
Hard to find an appropriate challenge as I don't know your scripting ability.
