The collection of new GP knowledge base articles for May is now online here. As always, you'll need Customersource or Partnersource access to view them. Cash Book and Manufacturing items lead in the hotfix section, including a hot fix for v8.0 for Cash Book Management.
In How To and other articles, there are a number of Project Accounting and Extender additions. If you're having problems in any of these areas, take a look at the Knowledge Base and of course, don't forget about the newsgroup.