@nenem,
Hi,
here we deal queries in English language.You can post your query in english or you can post your query in portuguese help forum of Orkut.
I think your query is related to "stamps of Orkut"
there is a seperate category in pt help forum.

Link for pt help forum:
http://groups.google.com/a/googleproductforums.com/forum/#!forum/orkut-pt

hugs,
r@jput.