Wow pretty cool site. I liked the design, really a lot of information out there. How many people worked on the project ?
Anyway here are a few points:
1) The submit button on the bottom of the register looks so plain.
2) The message after registering sounds strange to me. It says "You will also receive your chosen password via email at this time." what's the point of sending the password I choose.
3) Although I know you're validating the people who are registering I tried logging in. I enter my email and password and to an error message saying "undefined"
4) Forgot password: the same plain button.
5) Contact form: looks very deep
6) Contact form: I would add a warning message saying that a new form will be open for the registration process. You can join the list without entering a mail address.
7) Contact form: if I answer No to the question of beeing a professional and then "No" to "Would you like to receive a product brochure" I think the part of the form asking for the address should be hidden
Contact form: the right part is really veryyyy long.
9) The calculator looks old comparte to the main site.