Yes, there are HL2 modeling tuts available around the web. However, I didn't find any that were directed specifically to the rank beginner (i.e., me).
So, while waiting for my tutorial proposals to be processed by the moderators here, they're available in html format at:
http://veazie.org/Tutorials/hl2%20tutorials.html
I'll be adding a tut there soon for doing an animated model (suitable for a prop_dynamic) using XSI.