Pointing several sites with similar topic & content to one domain?

[simonmc]

I have several sites that are competing for the same visitor. I think google frowns on this and so I want to point them all to a single domain.

Should I park the other domains or some other way?

[Planet13]

I think you have to look at what is best for your users, but I think in short having one comprehensive site is going to be better than several smaller sites.

Can you do 301 redirects from the other sites to the main site?