i generally recommend that everyone do away with welcome screens, unless they're short impactful flash screens when appropriate. in this case, just scrap it. I love the color scheme and the framing of the site.
I like the font you used in "gallery" and the small description at right, but I would change it when you use it later in the sidebar links of the different topics. That font doesn't look good at larger sizes when used repeatedly. I love the font you used in your name, something similar might be better for those sidebar items. Also, lose the "click for..." screens on the different topics, they don't show properly in Safari and seem useless anyway... Just hinders fast operation. A streamlined website will elicit a more positive memory for the user.
Overall, i like it. excellent use of proportions and a calm simplicity that makes it attractive. Very nice.
🙂
paul