Iphone update to OS 4 was to be announced with the I pad the problem was os4 was not ready. OS 4 will do multi tasking. Other features include a unified inbox for multiple email accounts and the ability to place contacts directly on the home screen.
Also look out for the new I-Phone 3.2 to be introduced in June. It will be the I-Pad mini with a 5 inch screen 8 hours battery life. Front facing camera for video conferencing. A 3 time Zoom camera with a 3MP data chip and 720P video. Also the new I-phone will allow you to text by just speaking.