Thanks Mark for doing such a great job. This is going to be the definitive source for this info (or at least the summit descriptions, trip reports, et al).
In addition to the comments I have also made my comments on the addition/corrections sections on the summitpost list.
I don't want to stir up bad blood as I know the summitpost is basically a volunteer effort.
In 20/20, I wish I had had the tech knowledge to have set up americasroof as a collaborative wiki where folks could correct it and kept it up to date. The lax stance on my part has spawned a whole host of folks who have wanted to do a better americasroof.
Summitpost is definitely best of breed.
Speaking of wiki, check out:
Somebody has actually been improving it of late. Not all that long ago it was horribly inaccurate.
Both of those sites make me feel inadequate!