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I'm guessing we'll be able to jailbreak that too - there are exploits that are pretty awesome that the dev team has internally which they haven't used yet.

There already is a modification that lets you view flash content - it's called frash, by comex (same guy behind Spririt and Jailbreakme.com v2 / Star).

Here's the source:

http://github.com/comex/frash
 
We don't know yet, we need to wait for 4.2 is release to start working on JB solution, Greenpois0n have a good chance to JB 4.2 with just minors changes, but that is just speculations at this point
 
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