Just stumbled over a Post of Joel Penner in the TYPO3 Mailinglist. He is working on getting TYPO3 better working MSSQL.
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I think this is great news! Not that i am a Microsoft Fanboy, but this seems to tell me, that Redmond has recognized that TYPO3 is a great CMS and that MS Clients should be able to use this with the Database MSSQL.
(I have corrected the mispelling of Redmond. More Info about this nice City and hopefully a Website running TYPO3 too soon!)
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I hope that our TYPO3 Community will welcome this Initiave and I am quite looking forward the outcome of this work.
See the Post and feel free to help out: Mailing List.