MonoDevelop 0.12 is now available.
This release main features are: an action-based menu and toolbar editor in the Gtk# designer plus a new contextual toolbar for editing; It is now also possible to use MonoDevelop to edit ASP.NET web pages from MonoDevelop.
Other features include: a Deployment system to generate packages and tarballs; support for the autotools toolchain (generate autoconf, automake templates); Support for multiple file name encodings and many bug fixes.
Complete release notes are here. Directions for the packages are in the Download page.