Laura Quinn from Idealware has two good articles that are worth reading.
Behind Closed Web Sites: A Look at Three Nonprofit Intranets - focuses on three nonprofit administrative intranets providing case studies of ONE/ Northwest's wiki intranet, PETA's form-centric intranet, and the sophisticated intranet created by the American Lung Association.
A Few Good Event Registration Tools - takes a look at the myriad of options available for those who want to collect online payments and information from registrants for anything from tiny events to big conferences.
(This one was especially interesting for us since our own Wild Apricot software has quite extensive event registration features, especially suitable for people who run series of events and seminars. A neat feature we added recently is ability to tag - assign categories to your events and then easily search through the events in the future as well create multiple event list pages with different selections of event lists.) Here's a handy how-to. nptech nonprofit web2.0