We are working on re-designing the Evolution web to use the new shiny Grass theme from GNOME web. The redesign is mostly finished now, but we need a new set of icons for the website. The old icons are too small and from GNOME 1.x, maybe early GNOME 2 ages so they don't match the modern Grass theme.
You can look on http://people.gnome.org/~dvratil/evolution for preview of the redesigned page.
Contact me via mail (dvratil -at- redhat -dot- com) or catch me (dvratil) or mbarnes on #evolution on irc.gimp.org.