I got my Touch over a year ago in Dec '07.
My friend got 3 Touches from Sprint (for $25) right before they ran out of stock.
I saw his and his screen is much nicer than mine
Mine looks fine, except it washes out badly at any angle.
Just this week I started noticing the rainbow under the screen protector.
Not sure if if it moisture under the protector or one of the digitizer or LCD substrates coming apart...