Brizzly is a Twitter client. Though not the best of all the existing clients, what I see as the best in this app is that one can use it at work even if Twitter is blocked. I fail to understand how Brizzly actually does this.
Normal Twitter clients usually talk to the Twitter API, and most of them fail to work at work places at which Twitter is blocked by the firewall. Brizzly too should follow the same procedure to consult Twitter API to display user timeline, but how does it manage to by pass the firewall and retrieve the tweets?