+2  A: 

The HTML modules supports limited token replacement. For something more robust there are third party modules available as well. http://www.avatar-soft.ro/dotnetnuke/modules/token-replacement/my-tokens.aspx

notandy
Just what I need. Thanks. I also read that it is possible to create your own token-replacement classes, correct?
Abel
I am not sure. You may also want to look at PageBlaster, it is a popular module and has a "Powerful Replacement Engine" http://www.snapsis.com/DotNetNuke-Performance-Caching-Compression-Optimization.aspx
notandy