For those who want to run mojoPortal on Mono on their own machines I recommend you build Mono from svn trunk and keep a careful log of what revision you have so that if a future revision introduces a regression you can easily revert to a known good revision and rebuild and be back to a working version.
I have an older tutorial here:
http://www.joeaudette.com/buildingmonoforaspnet.aspx
Below is a script I use to checkout Mono (just the parts needed for ASP.NET) from the Mono Subversion (aka svn) repository.
I usually like to install the latest rpms to get MonoDevelop, by using a prefix when we compile the source there is no interference between the versions of Mono running on the machine.