It´s a magento "please enable" feature, that seems to have a unwanted side effect for crawlers like seomoz.
You find the setup in admin -> general -> web
Default is to redirect the visitor (without cookies enabled) to the default page called "Enable Cookies" set in. The cookie is needed for the cart module:
CMS No Cookies Page = Enable Cookies.
You can disable this with the setting: "NO" redirect in the bottom of admin -> general -> web and substitute it with a "YES" to show the notice alert on the top of the page to non cookie visitors.
Browser Capabilities Detection
<fieldset id="web_browser_capabilities" class="config collapseable">
Redirect to CMS-page if Cookies are Disabled -> No
Show Notice if JavaScript is Disabled -> Yes
</fieldset>
This should fix the 302 redirects!!
