You're trying to condone proprietary connectors??? Proprietary connectors do no good for the industry or the consumer, only the company that sells the product that it is on.
Not here to condone multiple connectors but a lot of companies do it. The only reason for companies like Samsung, LG, Sandisc, etc not to include proprietary connectors is because they don't have the leverage to do so. Apple does. Heck, even MS has proprietary connectors for their Zune.
You may not like it but you can't blame them for trying to milk an extra buck out of you because ultimately every business is here to milk a few bucks from the consumers.
I haven't looked cause I don't have, nor do I currently want, an iPad but I'm sure there will be generic (and unlicensed) connectors for it soon enough to allow you to hook up a camera or allow expansion slots.
USB can't do what the Apple Dock Connector does. It's one connection that does multiple things.
It's no more versatile than a regular USB port. I haven't looked because I don't care but it's likely higher speed than a regular USB port for use with add-on devices but nothing USB 3 can't do and USB 3 is at its heart a higher speed USB port. The major differentiator between the Apple connector and the different variants of USB is speed.
Do you know of any USB cable that does video out?
Do a Google search for "USB video card" and report back what you get.
Yes, but Apple also did it because they wanted to consolidate and only wanted to put 1 port on their devices.
Also, if you use the camera connector kit, you can attach USB devices to the iPad.
No. zerocool84 is right. Apple's connector is purely for profit reasons only. Apple could have consolidated the port with a standard USB port. It'll do everything the current Apple connector does. Again, I don't know if the Apple connector is capable of higher speed than USB 2.0 but likely USB 3.0 will even the playing field on the speed front.
I do think the second gen iPad will likely include an integrated camera just like the new iPhones have a front facing camera and the iPod Touch's have a front facing camera.
I do not think there is a snowball's chance in hell that Apple will include a SD (or other memory card) slot on their iPhone, iPod Touch, or iPad devices.