Omninerd has a great breakdown answering (maybe) the question Is a Hybrid Worth It?
You know what would really make this perfect? The ARTICLE. :)
For you picky people I've updated the html to not suck :)
He's looking at it from a purely US perspective obviously (hence the missing Toyota Echo). In Europe and Asia the price of gas has made the extra high price of hybrids acceptable, as it actually does save them money per month.
He makes a good point at the end though, that as technology and gas prices increase Hybrid owners will most likely be in the green instead of the red in savings.