For those that yet havn't noticed and are interesting at trying it out (I missed it completely);
MySQL 5.0.0 (22 Dec 2003: Alpha)
http://www.mysql.com/doc/en/News-5.0.x.html
http://www.mysql.com/doc/en/News-5.0.0.html
Note, should not be used as any realtime productive database due to undocumented bugs, incompability etc.. Migh be fun to check out though.
Mysql releasing first testversion of v.5
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