Weberence.com

Zemanta is simply amazing. All you have to do is download this program, install it and go on blogging as usual. This little tool changes your display by adding a Zemanta menu that searches the internet for similar posts to the one you are writing and in this way you can find info, tags, pictures [...]

[photo spigoo]
The US airforce, according to wired has forbidden their staff to access any sites that are and appear to be blogs.
The main criterion is the site’s address. If it has “blog” in it (ie blogspot) then the site is off limits. Other sites will be automatically (somehow) recognized as blogs and the access will [...]

If your blog uses wordpress 2.3* then you need to install the latest edition which corrects certain security issues.
You can see all the changes in v.2.3.2 here
and you can download the new version here