Saw him play quite often when he played for Boca with Tevez, Delgado, et al.
I personally like him - He has plenty of mobility for a center back and reminds me a bit of Canna and Cordova clone with his physique but, of course, nowhere near their mental thoughness.
Obviously he hasnt played as often as he would have liked to last couple of years, but we have take into consideration that his daughter was seriously ill. Football players are not machine and it will not be the first time a player went to a bad patch due to personal problems. Also, Burdisso if I remember correctly were beginning to force his way into very deep Inter defence.
All I know, Burdisso has talent and he deserves second chance.
As for Vucinic, his price tag is beyond what we should be spending on a forward ATM. And there are other positions we need strenghtening so I say pass.