What can I do with USB connector on iPad?

I’m getting the iPad’s Camera Connection Kit shipped from the US, and should arrive next week.

In the mean time, I am very excited about what it can do! I have read online that it already can:
1. hook up a USB keyboard – I’m very excited about this feature! Since I have purchased their original dock, it would be great to type quickly in the office!
2. USB audio – both microphone and speaker would work – although I can’t imagine myself using this.
3. Videos and Photos stored in SD or USB flash drives.
4. (with jailbreaking) open any file on the SD card.

Since I was looking around, and I can’t find any other great use without hacking the iPad, I am trying to see if there are any other additional use?

Some of my suggestions (probably requires jailbreaking):

1. Creating a SD card or USB flash drive that has a directory listing of DCIM (aparently this is the directory that iPad was looking for).
2. USB webcam – somehow create image buffer in the DCIM directory?
3. 3G rocket stick
4. connecting to a printer
5. USB to TV (very likely – if the TV can see the ipad as a mass storage)
6. Hook up with external DVD/CD/hard drive (port is not powered, but need to draw from others)

If there are other suggestions, please leave me a comment!

Related posts:

1. My iPad review
2. Using my iPad as a second monitor for my windows laptop
3. Best IM client for the iPad