I recently received the following e-mail from OpenWetWare, the collaboration site used by the Institute for Biological Engineering. The Lab Notebook is based on MediaWiki, the platform for Wikipedia. Although there is a learning curve, it is relatively easy to use. Best of all, you do not need to host the Wiki yourself and the costs are very reasonable (free).
OpenWetWare also supports a blogging facility. Blogs can be a useful ad hoc communication tool, especially if backed up by a Wiki for more formal content. I have asked for more information and will update this post with any responses.
Although there are many similar solutions available on the Internet, each lacks a large community of 'relevant eyeballs'. Using OpenWetWare for collaboration on biomimicry projects could get a larger community interested.