Yes. You can have as many HTML Web Signup forms on a webpage as you want. In order to have multiple HTML forms:
STEP 1 — Browse to the Form and Email Design Wizard by selecting the Web Signup Forms Option from the Lists Menu.
STEP 2 — Select the Create HTML Embed Form from the Resources Dropdown.
STEP 3 — Design and modify the form as you see fit.
STEP 4 — Copy the code in the Copy/Paste code to your site section and paste it into your website
That will create a single signup form.