I found that Google Friend Connect was ready for Blogger.com, do not need to upload two files, Blogger already setup the files for you. You can just ask the Codes and put the codes on HTML/JavaScript.

http://4.bp.blogspot.com/_2x3MogNp4NM/STj9ojAbavI/AAAAAAAAAXE/Wulv9Q5N2Lw/s400/blogger.png

You can find the words:

TODO(blogger team): Match the blog's template

But really, this porject is not TODO, is DONE.

Try it, and Enjoy it.

I couldn't get the gadget to show. Has anyone manage to make this work?

for blogspot.com, it is easy, two files already set up at the root. just get codes and pasted at HTML/Javascript of the dashboard...

dpneal:
If you paste the code in a post, make sure to merge all the lines because Blogger adds a break tag after each line (<br />) and ruins your code.