Jekyll does not provide any comment functionality. This makes sense, because there would be no way to capture and pre-process user comments at compile time. Does this mean that Jekyll blogs cannot have comment threads? No, of course not. You just need to use an external service to handle this sort of thing.
The MSUWEB service available to both students and faculty is very useful, but it has one major flaw - it is completely static. There is no server side scripting or database support, which makes it a less than ideal platform for personal blogging. Fortunately, not all blogging platforms require scripting or databases.