Better get that upgrade underway. SQL Server 2000 mainstream support ends in 2 months (8 April).
See the Microsoft Product support lifecycle information http://support.microsoft.com/lifecycle/?p1=2852
This week I have been working on restoring some documents from the content database backup of an SPS2003 farm. The back was from an SQL 2000 SP3a server so remember to keep those old product install disks handy.