Please re-read my post. The SE800/900 gave the user the option to remove the physical keyboard, leaving the phone with touch screen only ( plus a few buttons on the side ), see the screenshot below.
No physical keyboard - yup? I guess you'll have to look again...
You can search on Google to see that Jobs liked these SonyErcisson phones.
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Not to mention HTC had the Touch which was announced before the iPhone was revealed. To suggest that Apple invented the form factor is ridiculous.