I would have more questions:
1) Is there a reason to use www. before a domain name, for better seo results? I've seen some websites doing it, even though they could use regular
Domain-name.com., and I think they may be doing it for a reason, but I am not sure. Would www. websites be better than non-www. websites, in any way?
2) What is your opinion about list of links in the sidebar of a website like
Club Asa Akira. They have links like this on most of their websites, and all of them are showing on sites like MajesticSeo.com, and OpenSiteExplorer.org (along with seo parameters, which are often very good). Does list like this help in achieving good search engine results, or not?
3) What is your opinion about using the same Google Analytics code on a network of, lets say 100, 200, or even 500 blogs. The same code, all the sites. Would you say, that something like that can have negative impact on search engine rankings, because all the websites can be perceived as one network, which may be not very good. Or maybe it is ok to use it, and it does not matter much?
4) What is your opinion about Piwik? Does it make sense to use it, in some cases, for better seo results, probably with Google.com. Is there any good use to it maybe, or something like that. It is obviously not as good as Google Analytics, but it is free (second best free analytics)
5) I know that it is good to use a lot of different themes on networks of Wordpress sites, for better seo results. I would like to use a mobile theme on all these sites, also, and I am wondering whether I should differentiate mobile themes, the same way. I would say, that it is probably the same thing, and that it would be good to use multiple mobile themes, but I am not sure. Maybe one mobile theme, and multiple desktop themes would be ok?
6) Would there be any other places like Linkspun.com, which facilitate the process of getting xxx links? What other websites / applications / sources could be used here?
Thanks.