Speaking of converting in the ending, IM Moulthun Ly had a very good win in the 5th round of the Gibraltar Masters, beating Indian GM SS Ganguly. Despite playing Black (and the Sicilian), Ly built up a strong kingside attack, before reaching a rook ending a pawn up. Ly then showed good technique to convert the position, as rook endings are difficult things to play, especially if all you have left are rook pawns. The final moves of the game are well worth studying, as it shows the winning idea if you have a rrok pawn block by your own king on the 8th rank.
The win by Ly has him on 4/5 with a performance rating well over the 2600 level required for a GM norm.