Actually, the article has been out for about a month now, but I first solicited feedback on errors and typo's and then I forgot to mention the update here...
Anyhow, the article now also covers 2008 and the new date, time, datetime2 and datetimeoffset types. There are some interesting aspects of the new types which sets them apart from the old types. As always, I'll be happy if you let me know about errors or typos.
http://www.karaszi.com/SQLServer/info_datetime.asp