Today's Blogger Hangout on Air was on the subject of creating forms that you can embed into your Blogger website. These forms can be anything... polls, contact pages, feedback, reservations, anything you can think of putting into a form.
You can see the discussion thread or go right to viewing the video presentation:
For additional resources touched on in the video please visit these pages:
Tip: Adding a submission form to your blog
Tip: Making a Google Doc submission form email you the results