My Diamond came with one, did nobody else's?
It covers the whole of the top section of the phone with cutouts for the speaker and front cam.
Mine did too. It's OK, but does make the device a little less responsive and it shows up my greasy fingers too :-) Only real issue I have is that the 'glue' on the sides of the screen protector does pick up some light fluff!
Phone History: Philips Genie (Vodaphone: 1998), Nokia 7110 (Orange: 1999), SPV (Orange), SPV E100 (Orange), SPV E200 (Orange), SPV C500 (Orange), SPV C550 (Orange), MDA Vario 2 (T-Mobile:21/08/2006), HTC TyTN II (T-Mobile:05/09/2007) HTC Diamond (T-Mobile:20/06/2008), HTC Touch HD (T-Mobile: 21/11/2008), HTC Touch HD2 (T-Mobile: 04/06/2010)