this is what i did:
went to dell home and ordered the canon sd400.
then added the $56ish 2year extended warrenty. you can drop this, but will need to order something else that comes to a total of $50 on top of the $400 camera.
then i added a coupon for $70 for orders over $450.
www.ableshoppers.com
dell adds on it's own 15% off and free shipping. you pay tax.
total for me for the sd400 and 2year warrenty was $330. you may want to add on other stuff, like extra battery (ebay for $2 or radioshack for $40, hmm), carrying case instead of pocket, and extra sd card.