Great Topic, wrote on this last year (and should update it too): http://www.sqlservercentral.com/blogs/hugo/archive/2009/07/06/object-grouping-best-practices-using-schemas-for-logical-separation.aspx
Love Oracle, and whenever I hear the argument that MSSQL is cheaper because it is easier to manage more databases...I can't help but scream you are comparing Apples and Oranges. Simply cannot compare the two, because Oracle prod installations use Schemas way, way, more than in SQL Server. In corporate environments this started changing a load last year, within the several groups I worked with.
Thanks Phil, for pointing this great database organisational tool out in the newsletter.
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