I think there was an app for the N90 that enabled it. IDK.
There's quite a few of the smaller, flashy things that Nokias lack in. For instance, caller id pics and the whole thumbnail routine. At one point, you wonder if anyone up there actually uses these phones and notices these annoyances. However, given that there's several 3rd party developers whose apps accomplish the same thing, it might make more sense to limit your out-of-box experience in order to encourage 3rd party developers. I could see how it'd be discouraging to create an app with a function and then have the manufacturer build that function into the device, you know?