I’ve seen plenty of people using the more powerful Zoho content creator to make a ‘contact me’ page (and it does have plenty of powerful features including captcha and file upload).
1. Log on to Google Apps and create a form
2. Add the fields you wish your contact form to have3. You can embed the code (click here to get it) in a blog post or a Google Sites page
4. Copy the link at the bottom of the page and make a note of it – this is the URL you’ll need to link to if you want people to click on a link and fill in your form.