I also found this to be a fairly low-risk way to get use to projecting the ipad in the classroom. Projection using the "laptop" setting on the tower worked seamlessly and automatically. I did, however, have some trouble importing my file using webdisk. Does anyone know if this is possible?
In response to Daena's query about other PDF annotation apps, I haven't used the others so I can't make any comparisons, but I can say that GoodReader also has the ability to "flatten" files so they can be easily distributed.