Funnily enough i'm a current final year student there, doing VoIP. I did mine in Java / JMF, was a pretty stupid idea due to JMF being undocumented / unmaintained, however got it all working in the end.
If you really really want a specialist degree you'll have to do an open project, however I was looking at the guided projects and they're really really REALLY easy, possible to finish it in a week for a 2.1+.
The VoIP project i'm doing is 6 times harder than guided. The difficulty between open and guided is so stupid and I doubt the marking scheme will account for this.
You're doing placement this year, so last year you were in year 2? Maybe same time as me, I skipped placement. Did you have to do the group SSD2 coursework?