Not bad, Bokeh. Yellow/orange tend to be a bit difficult due to their harshness on the eyes, but yours isn’t that bad at all.
Your header graphic needs to be re-done, though, or at least anti-alias the text so that its edges are not so rough.
When you're typing (in Photoshop CS), at the top to the right of the font menu there should be another smaller menu a couple inches over. If you pull it down, it will have options like "normal" or "smooth" or "sharp." If you pick "smooth" and have the text highlighted, it won't appear like that. (I'm pretty sure you have to highlight it to get the effect on it, but I don't know since I haven't used Photoshop in a little while.)
It looks like your images are GIFs with transparent backgrounds. I would suggest using a light yellow matte on those transparent GIFs so that they can be smooth and their edges will be (mostly) transparent. The matte should be subtle enough to where it’s not noticeable in the header, but the matte should be used to make the text more anti-aliased — the rough edges are a result of no matte and a transparent background.
Also, I think orange is much better than purple or lilac. Those colors are nice, but I’ve never really been fond of yellow/purple (though the contrasting colors make perfectly good sense together, I guess I just don’t like it), but of course that’s my personal opinion. I like the orange more.
I really like your site. It's simplicity is refreshing, and the color scheme eye-catching.
One thing I would change would be:
Valid XHTML! Valid CSS!
at the bottom of the page. The exclamation marks don't look very professional. You also may select a better description of these links. (I wasn't sure where they'd take me.) You might opt for "Check our XHTML Coding" or "Evaluate our XHTML Coding."
Good Luck & What an interesting service you provide!
i like your site...simple....that's good. the only problem with the site is like the other posts, the header logo has definitely got to go, go with something a bit more linear.......some kind of sans serif. and also the color scheme is killing my eyes, maybe go with a soft orange?