A friend just pointed me towards a blog that's doing a clever promotional effort: 7 reviews with 7 giveaways.
What I really liked about Shanna's blog was the December 3rd post: This counts as school, right?
Somehow, it captured the spirit of homeschooling at it's most simple and charming. And I quote:
All on their own, the kids decided to create a script, build a set, and act out their own lego film. They asked me to film it and put it on my blog. Well, how could I resist?
The give-away idea is good. It's effectiveness depends on how well promoted it is and whether the giveaways are significant enough to endear the visitors to the site. That's my $.02. (In any case, that's what I learned when I took my Intro to Blogging and Blog Promotion course).
Check out her site.