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smithaa02 - 3:04 pm on Nov 2, 2012 (gmt 0)
Sorry for the confusion Jez...My personal vote then is if you do want to keep the old domain for branding but not SEO, then I would not redirect but rather keep it as is and put a 'we have moved graphic' that people can click on. People have definitely been hit by 301'ing polluted domains to new ones. If you turn the old page into a portal to your new...maybe obfuscate it with javascript link, js redirect or flash or even nofollow the link to keep google off your back. Just seem like 301'ing is too dangerous.
A option might be a 302. Google says these are ok for advertisers because they don't pass page juice...might be worth it to research to see what happened for penguin hit sites 302'ing to new domains.