Here's a video with Alexander Megos climbing a bunch of boulder problems in the 8A - 8B+ range in the Grampians, Australia.
While there he basically did all the hardest problems in the Hollow Mountain Cave as well as putting up a few new ones of his own, some of which are now the hardest...
Read more at http://www.ukclimbing.com/news/item.php?id=68445