Not bad for a midfielder Nick, but I think Cristiano Ronaldo would still be classed a midfielder and he has clocked up 200 (just 2 less than Lampard at Chelsea) for Real Madrid in a third of the time... Lampard's scoring rate is good for a regular midfielder, but the trend towards midfielders operating as auxiliary forwards (like Ronaldo, Bale, Michu and Fellaini) will make comparison difficult in future.
They would be stupid to let him go in the summer, he still has a lot to give but having said that they have some class midfielders at present. He can still play a role similar to what Giggs has for united