My newest project just launched today. It's a site called Staxup, which automatically compares products by seeing how they "stack up" against each other online. As the official description puts it:
Staxup turns praises and complaints from around the web into visual product comparisons.
If you're in the market for a digital camera, your next road bike, a limited-edition watch, or almost any other product you could buy online, then you can create a custom comparison to see how one option compares to another.
Staxup is totally free, and you don't even need an account. To give you an idea of how the site is already being used, you can also see the comparisons other users have already created.
Staxup still has a lot of room for growth - including support for things that you can't buy - but for now I'm confident that it's a useful tool for anyone shopping online. So tell your friends about it, and let me know what you think!