I've run in elastic laces for the past few months. I have no idea what brand they are, but I have to say that I absolutely love them. Before I got them, I thought speedlaces where the absolute tri-geekiest thing in the world. I mean, if you can't take 30 seconds to tie your shoes, you've got issues. But I got them on the advice of someone who was also suffering knee problems who said they helped.
I have no scientific basis for this, but I do think that the elastic laces have helped my knees and have helped my stride overall. The reason is that my feet can move around more in the uppers -- they aren't locked into the limited forward-back motion that the upper allows. Thus, I can push off a little more smoothly, and I can roll just a little more smoothly when I land.
Does anyone who knows more about foot mechanics have a better explanation? Or a reason why my gut feel is completely bogus?
On a related note, I highly recommend a product called RoadID, which is a metal ID tag that velcros into your laces. It's a great way to make sure you've always got some ID on you in case something happens. There's also an ankle and a wrist version.
http://www.roadid.com/ Lee