XML and PostgreSQL

I am wondering if any of you work with XML-PostgreSQL extensively.

I usually do presentations in HTML for web stuff, but I am now about to
embark on a large ( for me ) project with potentially many layers of
presentation and data manipulation.

I am wondering how well PostgreSQL deals with XML and whether, in your
optinions, it is worth trying to learn a decent amount of XML to
accomodate this project. It's going to be quite long anyhow, since i am
doing it pretty much pro-bono and by myself, so a little research time might be alright if the advantages are great
enough.

thoughts?

regards,
dan