MySQL 5 is ready for production use. Here is the snip from MySQL web site…
“MySQL 5.0 is the most ambitious release in MySQL’s history. MySQL 5.0
delivers the enterprise features the community has been asking for,
including Stored Procedures, Triggers, Views, Information Schema, XA
Distributed Transactions, and new Storage Engines. We also added
Strict SQL Mode to eliminate some of the ‘Gotchas’. Plus, MySQL 5.0
builds on our reputation for Reliability, Performance, and Ease of
Visit http://dev.mysql.com for more info.