I came across something new for this:
While with Joomla itself and with Flexi you are S.O.L. when it comes to duplicate URLS, there is a way to tell google which content pieces have the same source.
Read:
googlewebmastercentral.blogspot
. ... nical.html
So you can specify a canonical url, which is the 1 true version.
There are some core Joomla com_content solutions, but nothing for flexi yet.
A flexi canonical URL would be: something link yoursite.com/component/flexicontent/item/10, not pretty - but who cares for the search engine? They will still index all your other SEF urls, but know what this is. Actual humans searching are more concerned with the title and the part of the page that matched there search, better to get the SEO boost I would think.
The problem though, is that if you load the base SEF canonical URL it will break some of the links. For example, the default category field will produce a dead link. This is going to produce 404 errors when clicked, since this is the page Google will actually present.
I have posted a bug on the SEF router before, but it was closed as not a bug. So I am not sure what to do on this regard. The canonical URL logic could be integrated for categories, items, tags, etc natively in flexi. This would really help push it above other CCK and the core.
This still does not alleviate the problem with some external services such as commenting systems which look at the actual URL. Better to just deliver the page at one location all the time, but this would definitely help us with SEO. I encourage others to open up bugs so this can be integrated.