After looking at the spec Ive created for the gallery, I have concluded that it is defiantly not as simple of a script as I had first thought. It should however, still be a shorter amount of time than I first thought.
While I was thinking up the spec for the gallery script, I went through and made certain that my blog script was generating valid XHTML. I finished the cleanup work this morning and so hopefully later this evening I should be ready to really dive into the gallery script at full force.