There is a nice web based interface through which you can browse the development of SME Server core packages and you can find it [http://fisheye1.cenqua.com/browse/smeserver/ here].
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There is a nice web based interface through which you can browse the development of SME Server contribs and you can find it [http://smeserver.cvs.sourceforge.net/viewvc/smeserver/rpms/ here for SME_Server] and [http://smeserver.cvs.sourceforge.net/viewvc/smecontribs/rpms/ here for SME_Contribs].