Here is another for the wish list John, as if you don't have enough going on here.
On the "other" site we have a winter 14er list. SarahT mentioned to me that she has only climbed one 14er in the winter but many 13ers, it seems logical that we should also have a winter 13er list.
Of course this leads to having the date climbed instead of the date input, I don't remember your reason for the input date rather than the date climbed. It seems the date climbed could give us lots of useful output, like how many we have climbed in different seasons in different areas, etc.
Then the little mountains could turn white instead of orange when we mouse over them.