Yes, Apple never responds such questions. I also sent them feedback on their web site (
http://www.apple.com/feedback/iphone.html). No response.
Happily though, Apple released iPhone firmware 2.2. And with that Turkish language support and Turkish Keyboard support (sort of) are available at last! (Several months later Apple officially released iPhone in Turkey!)
Turkish Keyboard support is sort of available because it is not a real keyboard. You can see and use Turkish characters only by pressing your finger on their english counterparts and waiting a while. Auto correction for Turkish language is not available yet.
PS: I do not wait a response from Apple. I just want to hope that some folks from Apple may be reading these discussions.
thanks