I don't see why I would use that over this: http://lab.xms.pl/markup-generator/
Not only does it have the same syntax (with some improvements), but it also gives me the CSS to work with. AND I don't have to install python. Hooray.
http://shpaml.webfactional.com/tutorial/7
SHPAML is mostly targeted at Python users for now. If you are not using Python, but you like the idea of having a syntax layer on top of HTML, then you should consider other solutions like the markup generator or haml.