Change the sort_order in the MTComments tag.

I'll paste this in since I can't manage to make a link:

MTComments

A context dependent container tag representing a list of comments on an entry or for a weblog.

* lastn

Display the last N comments in context. N is a positive integer. lastn is optional in an entry context and required in a weblog context. When used in an entry context, all comments associated to the entry is displayed by default

* sort_order

Specifies the sort order and overrides the General Settings. Recognized values are "ascend" and "descend."

I prefer the "newest" on top, for certain blogs that I constantly recheck back to their comment page because it eliminates re-scrolling. But for all other blogs, newest on the very bottom is more orderly.

RonW - There's a blog that I read where comments can easily total 80 or more, and I find it's difficult to follow what's being said by reading in reverse.
Since I don't get anywhere near that amount of comments, we'll see how it plays out here.

Al - I've changed it (thanks! duh, it was considerably easier than I thought.)