If you’ve already passed your SBS 2008 Exam then this one should not be a problem for you. You should bear in mind however that now that the SBS 2011 Exam is out, your SBS 2008 credentials are invalid as pertains to your SBSC status, so you’ll need to sit this one pretty quickly.
Microsoft list the overview for this exam here – it’s the 70-169 SBS 2011 Exam.
It focuses on SBS 2011 Standard, so you won’t need to know anything about SBS 2011 Essentials to pass this exam.
Tim Barrett has a blog post of Free Online Microsoft SBS 2011 training that can help as well here – although the competition he mentions has passed, you can still do the training courses.