Welcome to the Q&A Forum

Let's assume that someone has a blog and they've added the author tag to that so they appear in author search. Let's say they then write an article on another site? Can that site use the same author mark for them? I guess the question is: Can the same author mark be used across multiple sites?

The BETA version of the site is noindex,nofollow'd, however non-beta version is fully open and indexed by search engines.  You can confirm this via the site: command in the various search engines.

If you are going to be allowing comments on the blog, why not allow it? Sure, it might be a move by an SEO, but if they are writing exceptional content that really does increase the worth of the page, what do you have to lose? I say approve it. The little part in your head that is saying "Don't do it" is the little thing in all of us that are greedy about our link juice. But, if it adds value to the page, that little bit of lost link juice--if any--is going to more than make up for it in creating conversation and ranking for other keywords in Google perhaps. That's my opinion, at least...

Thesis is a theme/framework that is built for WordPress.org. Tumblr is a free blogging software. For SEO perspective, I'd go with, hands down, Thesis. First off, your URL on tumblr is sitename.tumblr.com. Secondly, it's free, so it's never as good. Thesis is built with a lot of in-code SEO so the site has maximum growth. I'd definitely go with WordPress/Thesis.

What's important to avoid is low quality links. For example, if you're submitting the site to one of those "We'll get you listed in 10,000 directories over night" kind of thing, you'll get hurt. But, if you're naturally building backlinks, Google won't care.

I'd be careful with that footer you've got. I might be behind the times, but I think that could be considered keyword stuffing which, last I checked, Google doesn't look to nicely upon.

If you are going to be allowing comments on the blog, why not allow it? Sure, it might be a move by an SEO, but if they are writing exceptional content that really does increase the worth of the page, what do you have to lose? I say approve it. The little part in your head that is saying "Don't do it" is the little thing in all of us that are greedy about our link juice. But, if it adds value to the page, that little bit of lost link juice--if any--is going to more than make up for it in creating conversation and ranking for other keywords in Google perhaps. That's my opinion, at least...

Thesis is a theme/framework that is built for WordPress.org. Tumblr is a free blogging software. For SEO perspective, I'd go with, hands down, Thesis. First off, your URL on tumblr is sitename.tumblr.com. Secondly, it's free, so it's never as good. Thesis is built with a lot of in-code SEO so the site has maximum growth. I'd definitely go with WordPress/Thesis.