I did some research on this a while ago
The best I found (with enthusiastic references) was [link|http://nwc.securitypipeline.com/showArticle.jhtml?articleId=18402819&pgno=5|this]. Sadly, I was unable to purchase this as SMS will have most of the same features/abilities Real Soon Now. As soon as my manager heard that SMS/SUS would be upgraded some time in the future to maybe do the same things as the above product, he shut down the testing of the eval copy I had gotten and decreed we would remain with the MS vapor solution.
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"In this world of sin and sorrow there is always something to be thankful for. As for me, I rejoice that I am not a Republican."
-- H. L. Mencken