From the Mono FAQ (http://www.mono-project.com/FAQ:_General):
"How is Mono related to GNOME?
In a number of ways. This project was born out of the need of providing improved tools for the
GNOME community, and will use existing components that have been developed for GNOME when they
are available. Mono team members work actively on the Gtk#
(http://www.mono-project.com/GtkSharp) project: a binding of the GNOME class libraries for
.NET and Mono."
Part of the problem - and the danger - is that the relationship between GNOME and Mono is
rather ill-defined, certainly in terms of perceptions. That makes Mono's very close
relationship with Microsoft a problem for GNOME - even if there has been a "less than lukewarm
embrace of Mono from the greater GNOME community."