If the technology exists to conduct a non-destructive investigation then yeah...why not? What I don't want to see is a big song-and-dance, TV special thang that's gonna over-run the place with dickheads and further erode the fragile Avebury landscape.
I'd love to know what kind of structures are in there, I just don't see the need to dig 'em up!
'ave a look by all means but...do it on the quiet...

I gave a talk last night at Sligo Institute of Technology on megalithic monuments around Sligo. One of the points I hope I made was that Maeve's Cairn on the top of Knocknarea ( http://www.themodernantiquarian.com/site/2302 ) should not be opened.

There seems to be a rash of excavations in Sligo right now. The vast majority of these are re-excavations of sites that were first investigated back in the early 1900s, but somehow it seems only a matter of time before eyes turn seriously upon Maeve's Cairn. It could be the only undisturbed passage tomb left (there are a couple of other candidates) and it's fully understandable that any archaeo should want to excavate it - it would, after all, make their career.

However, with technology advancing the way it is, it can only be a matter of little time before we can look into Maeve's Cairn and other such structures without destroying them.