Apple has launched a prototype of an iPhone. That's why there is so little technical information. Of course the real iPhone will be open to developers, but at the moment there isn't such a thing as iPhone. An excellent market research idea from Apple. Launch a non existent product that no one can buy or develop software for, listen to public opinion (e.g hard disk too small, closed vs opened platform, no 3G support), and design the real product according to potential users feedback.