Our blog uses the excellent Dot Net Blog Engine as our blogging platform. You can use VistaDB as the backend store quite easily. Al Nyveldt’s blog has some great posts about setting up and configuring VistaDB with Blog Engine, but they are all for VistaDB 3.x. The Dot Net Blog Engine knows how to load provider factories, so it is quite easy to update the configuration to talk to VistaDB 4. I did these steps on our blog a while ago and everything has continued to run smoothly.