I agree with the others, it's a great first start.
My comments - take or leave, as you like.

(I get anal

, please don't be offended)
FRONT PAGE:
1 - I'm not sure about the graphic at the top...are you targeting engineering/architectural firms?
2 - the block logo next to the "why hire us" looks a bit out of place. Maybe use that up top instead of the building? Also, at the very least, you need to make the background transparent so there's not a white square around it.
3 - You might consider bolding some of the key words to make them pop a bit.
4 - What do you mean by "work
in your business" in point 1? Maybe change it to "We allow you to focus on the important tasks while shifting..."
5 - Point 2 seems run-on to me. Maybe change it to "2) We perform multiple types of tasks including word processing, maintaining bills, and marketing projects such as flyers, postcards, brochures, business cards etc."
6 - For point 4 maybe something like "We offer customized solutions to fit your individual needs"
7 - I think you should take out the "and finally" in point 5. You don't want it to seem like the list has been dragging on. I'd change it to "And most importantly," Also, if you're going to add the calculator somewhere, I'd take off the explanation of why you're saving them money. Or do it on a separate page with maybe a "see how" link after the first sentence.
RATES PAGE
1 - You're using multiple font sizes on one page.
2 - Under Hourly Rates you have 2 hard returns between your paragraphs.
3 - In the Retainer paragraph, you have 2 spaces between the words full and before in the 3rd line (told you I was anal!)

4 - The bottom part "Fees not included" those aren't really fees, they're materials. And really, some of them should be included unless they're for a specific project. For example, you aren't going to charge them for a stamp and envelope to send them your bill or $.10 in ink to print a fax (or at least you shouldn't those are operational costs and should be built into your hourly fees) but you would for a mailing. IMO, it makes you look a bit nit-picky. So maybe change it to something like "The above quoted rates are exclusive of special material costs required for projects, which will be quoted before project commences" or something that sounds better...