@leopedrini, what are you looking for in a blogroll? There are several use cases, and I have approaches for at least a few (my favorite is creating a category for links and using per topic settings to encourage discussion).
Are you looking for interactions with users? Or an easy way to update a dynamic list of URLs from Discourse? Let us know what you are thinking. 
Also, have you seen the new sidebar? It has sections that we are just now beginning to explore how to we want them to be customizable. Most blogrolls I’ve seen online are sidebar sections.