Seriuosly who checks these things? My first Nokia was exactly 10 years ago. It had custom ring tone for each contact. I have had about 8 Nokias since then. Each one has had the same feature. I never ever checked the internet each time to check if this was the case. Why would I do so for the N900. Some features are assumed to be a given, particularly if you have had 8 phones from that manufacturer that had that feature. Custom ringtones is just an example.

Sorry don't mean to be rude but it is absolutely ridiculous to suggest you should check whether a $600 device has things which are ridiculously basic.