Found this plug today:
http://magnus.smartelectronix.com/#ambience
description from the website:
Ambience is a reverb that rivals the quality of the best commercial reverbs. You are free to decide yourself how much you want to pay for it, and when.
It does seem pretty interesting and it comes with a pretty extensive preset collection. My initial impression is that it doesn't sound as synthetic as many reverb plugins does, and its rather easy to control the different aspects of the sound.. its worth checking out (anyone else know/use this one?)
/Michael