i realize there are tons of problems, and with Perl, tons of ways to solve them. i *should* just hang out here more ... instead of hopping on when i'm stuck and/or 'bored' ( i.e. procrastinating ).
Take a look at Generic RPN Translator available?, it's the most intersting problem today. What you would do with it when you've done--if you get that far--isn't really a concern. You'll learn something from the attempt anyway, and some of it will prove useful down the line.