This version of VSMessenger provides support for persisting provider choices (i.e., it will persist which providers are loaded as well as remember your currently selected provider). It uses the Options Pages as a persistence mechanism, and therefore provides code samples showcasing how to both provide Options Pages data within a Custom UI, as well as how to use/consume settings persisted within those pages.
For more information, see the following blog post:
http://www.vssdk.com/?p=302