Following the post below I would try to put a Google Sitemap in this Blog but in this link (http://blogger-tricks.blogspot.com/2006/04/adding-google-sitemap-to-your-blog.html) it seems that you can't use Sitemap in Blogger (go figure!).

But searching a bit more, it was old news (http://theos.in/adding-google-sitemap-to-bloggercom-blog-account.html). It is possible to add Sitemap to a Blogger account (always search a bit more for updated information. Sometime you can act based on old data).

I'll try the step-by-step on that page now. More info to soon follow.

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Updates:
a) The images and layout on Blogger.com are a bit different from what's on the tutorial, but it was basically the same. The verification was easy and quick.

b) Now to add the actual sitemap, there was a problem. That info in the link was too old too... I'll have to find a new, recent tutorial.

c) Turns out that IT SEEMS that I just have to add a /Atom.xls at the end of the URL in the Sitemap text field with the adress of the site. I'll have to wait some hours to see if it is working. All and all it was a good experience. (http://labnol.blogspot.com/2007/09/fix-blogger-sitemap-xml-warnings-inside.html)