The second installment of our Ultimate Twitter Client Roundup brings us to Seesmic for BlackBerry. At this time Seesmic is fairly new to the scene, but it already shows tons of promise and the updates keep coming. It doesn't have an overload of features, but its speed and clean interface make it a strong player. The ability to view timelines, mentions, DMs and even lists add to the fun that is Seesmic. Check out the video above for a quick walkthrough.