What is grab?
Grab is python library which simplifies writing the web scrapers. In short, grab provides solid interface to use pycurl and lxml together.
Documentation (a bit outdated): http://packages.python.org/grab/
Awesome article (in russian): http://habrahabr.ru/blogs/python/127584/
Please submit all questions to google group: http://groups.google.com/group/python-grab/