John Abraham, the US academic who keeps falling out with Lord Monckton, has written an article about the MWP. It's a bit of a mixed bag, but there is much of interest.
For example, there's this rather naughty bit of quoting out of context:
the National Academy of Sciences thoroughly investigated [the MWP] and concluded, “the late 20th century warmth in the northern hemisphere was unprecedented during at least the last 1000 years."
Unfortunately, examination of the NAS report shows that they actually said:
The basic conclusion of Mann et al. (1998, 1999) was that the late 20th century warmth in the Northern Hemisphere was unprecedented during at least the last 1,000 years
So they did not conclude that 20th century temperatures were unprecedented, they made an opening observation that Mann had claimed this. As I'm sure readers here know, they concluded that Mann's claims were "plausible", which is not the same as concluding that they were correct.
Abrahams also gets comments from a number of paleo people in reference to two questions:
The responses are very interesting, because several of the respondents don't seem to have addressed question 1. I'd love to know what they said - my guess is it's something along the lines of "we don't know". Such a response is certainly suggested by Abraham's conclusions:
...the existence of the MWP is not in serious doubt; but whether it was global in extent or warmer than today is. In addition, the presence of a MWP does not call into question whether humans are now causing the Earth to warm.
These two points are both fair I think. The first point is particularly interesting: it's a reasonable interpretation of the science but it's a long way removed from the IPCC's conclusion that temperatures are "likely" the highest in 1300 years.