I found this article interesting:
http://wine.woot.com/Forums/ViewPost.aspx?PostID=2090643
I don’t claim to know as much about wine as I do about beer, but I had always thought that malo-lactic fermentation was only used in Chardonnays. Now I wonder if it could be useful in very high gravity ales or mead.
- Chris

Quite. MLF is pretty much universal in red wines.
The thing I would be worried about in ales or meads is that without a good tannic structure to balance to flavors, MLF can leaves wines with a buttery taste to it (this tends to be my issue with most chards, especially when then also over-oaked). That may not be desirable in the ales or meads, but I may be mistaken.
Probably worth an experimental batch.
It might add an interesting complexity to Mead, but probably wouldn’t be very good in ales.
- Chris