joomla and wordpress together with indexU

[Dr. Jekyll]

I am not sure (for a seo point of view) how to install joomla or wordpress with indexU.

Of course i will install indexU at www.mydomain.com, what about joomla/wordpress?

Shall I use a subdomain? and if yes, which subdomain?

[Bruceper]

well your best option would be to use a keyword for either the subdomain or directory. Personally I have never seen a difference in SEO between subdirs and subdomains.

If you're going to use WP for news then I'd name the directory /news/. If it is for updates I'd use /updates/. I'm sure you get the point.