Raburn's been having a pretty damn good year in the minors before his callup:
.292 AVG, 17 HR, 64 RBI, .394 OBP, .540 SLG, 12 SB, 60 R
Now with his 10-20, 3 HR, 10 RBI's, he's looking like a good option if you're willing to wait him out. I'd say he's worth a roster spot if you have a disposable player. Wait a little while, see if he pans out, and if he kicks ass, anyone who had him now looks like a genius.