Just a quick post to make sure all know that a version of Oracle's 10g database is now free...

Free
to develop, deploy, and distribute

Oracle Database 10g Express Edition (Oracle Database XE) is an entry-level, small-footprint database based on the Oracle Database 10g
Release 2 code base that's free
to develop, deploy, and distribute; fast to download; and simple to
administer.

 Oracle 10g Express Edition has the expected limitations on size, but Oracle has greatly improved the install process.  (If you have tried to install 9i before... you'll see what I mean.)  They appear to be going after the MySQL market share with this free offering...  should be interesting to see how it plays out for them.

For your next project, it will be worth your time to investigate this new option.