Well dib, I've had a chance to go over your situation and I must agree with jumpman's assessment. It's not really a ban worthy offense to be slow in regards to providing information unless the item(s) and/or funds are already in transit.
However, I don't disagree that it
is an inconvenience to you in regards to the amount of time and energy you've expended waiting, inquiring/responding, and even making the various related topics here on the forums. It can be deeply frustrating to wait on the whims of another. While you're sitting here, the anxiousness building, he's likely not doing the same or you wouldn't find yourself in this particular situation.
Again though, I must stress that tardiness in the beginning stages of a transaction really is not worthy of a trading forum ban. As others have suggested, if expedience is of the utmost importance to you, then I too would recommend canceling a trade such as this if it hasn't begun within the time you've allotted.
And to the seller I would suggest not initiating a trading transaction he or she cannot complete immediately. Or alternatively specifying from the beginning that it may be a short time before they can begin. Though honestly it would be much easier to simply put off said trading forum post until they're absolutely ready.
I'd also like to state that I'm very pleased with the level of civility and maturity being shown in this discussion. Good show, folks.