WPMU plugin or configuration suggestion

On my website using the social theme - http://denvertherapistsnetwork.com - I have 3 pages that admittedly are a lame solution for a need for the website.

http://denvertherapistsnetwork.com/therapygroupsindenver/
http://denvertherapistsnetwork.com/bookreviewsbytherapists/
http://denvertherapistsnetwork.com/online-resources-and-links/

Right now I use comments (because they require you to be logged in) to provide these 3 sets of resources and it really is a poor solution. I am sure there are some great WPMU plugins that would offer a far better option, but there are so many it is hard to know what one exactly is the best fit.

Any advice would be great appreciated - especially if there was any way to easily migrate the existing data. But I am guessing that is unlikely, but maybe I can put something on the same page and just leave the comments at the bottom so they are still available.

Thanks! David