Here is an article by Darren Dreger of
www.TSN.ca/nhl/ that briefly breaks down the "Top 20" NHL rookies for the 08-09 season. It's not much, but you could cross-reference that list with
www.hockeysfuture.com to get more info about each player. Their prospect bios are usually rather informative, with a decent description of the player's strengths and weaknesses.
I used HF (along with THN's draft & Future Watch issues) when I did prospect caps in previous years. Unfortunately, I just don't have the time to do it now or I would help.
PS - Remember to keep rookies/prospects Poise ratings at 70 or below, as this keeps their overall 3-4 points lower and will help to keep guys on lower lines or in the minors. This way you can give them good ratings in the stronger aspects of their games without having inflated OVRs.