WebmasterFormat have written a very fair review of ocPortal which can be found at: Is ocPortal the Best CMS for Me?
They make a very valid point about theming and I think it's fair to say that not everyone wants to learn CSS in order to make a unique design for their site. This is something that is very much on our radar and you can expect some good news on this front in the coming months.
Have you written about ocPortal? Let us know, we would love to hear your thoughts; positive and negative.
Article on WebmasterFormat