Hello and many thanks to you all for your constructive comments. At least I know you have thought about the site and suggested ways of how I may improve it.
I agree with dwarfthrower that the home page "gives no real indication of your capabilities". It does just seem like marketing talk, so I will improve it. I have, however, deliberately left the phone number off (at least for now): junk email is one thing, crank calls are quite another!
I know what deecee means about the guestbook being personal, but I wanted something where people could leave a 'presence' without having to contact the webmaster. I suppose I could make the guestbook less personal. i also agree with this: "your use of the iframe for your email.asp page is not necessary". I'll start work on it this weekend!
I am especially grateful to GUJUm0deL for looking at the site through another resolution and for suggesting the site be centered. Task number 1!
In short, I have saved this page and will consider all of your ideas (and act on a number of them - form field validation in the guestbook and scrollbar colours, for instance).
I will not act on them all, because some - like removing the girl - run contrary to my picture of the site, but I am grateful, again, for your suggestions.
Thank you!
Hatter