MacCentral posts a detailed walkthrough of an experience installing Windows XP on a Intel Mac mini.
The article gives a good overview of the process and some potential pitfalls during the installation, as well as ongoing driver issues.
In short, this is very new technology, and things can still go very wrong with the process. If you have but one Mac, and you rely on it to make a living, I would not recommend installing Windows XP on it just yet. Over time, the process should get easier and safer, but as of today, its still highly experimental.
MacCentral also ran some early Photoshop benchmarks, and plans on more extensive testing.Forum members can discuss their own experiences in our Windows on Mac forum.