Okay, I'm on the committee for the Water of Life Society at Edinburgh Uni and had booked Davinia Small for an ardbeg tasting last thrsday for quite a few months, and luckily for us its fell right before this release!
As you can guess she brought s along some Rollercoaster but didn't want it mention that we tasted it before Monday and certainly didn't want tasting notes to appear from us.
Anyway she told me personally that its 15,000 bottles release.
As for the whisky itself, hmm, it was nice, but I would rush to buy one if it was a general bottles, 10yo, Ooogy are better to me, however I think its more of a whisky that some will love (heard from a few people that they didn't like it as there was too much going on, but then some people would love that).
P.s we invited the Edin whisky blog along, prob better tasting notes than me lol, heres there article. http://www.edinburghwhiskyblog.com/2010/02/15/ardbeg-rollercoaster-review/#more-3667
On a side note, Corryvrekan is a standard bottling for a limited period (as opposed to a limited bottling) it will be released regualarly for the next few years, next release being later this month