Yes, lack of voice dialing and no voice announcement when ringing is very disappointing to me. These are basic features of any advanced Nokia phone and when I bought N900, unfortunately I assumed they would be there. Without voice dialing it is a pain to use this phone in a car. Voice announcement (phone speaks name of caller, taken from address book) is very useful when you need to know how important can be the arriving call.

When I look at some voices above saying "no we do not need it" - I am just wondering - what people use N900 phone for? Games?
I try to use it at work. But N900 is not really suitable for every-day business use - hardware is great, software provided by Nokia - far from expected.