Hi Adam,
Welcome to the boards.
We bought at AKL in November. We had visited WDW in July last year and took the tour with our guide Jonathan. We then came home to do the figures and make a final decision.
In November I phoned Jonathan and told him the number of points we wanted (270) at AKL. Having read more of these boards I would probably have split this up into 160, 50 and 50 (as the closing costs are reduced if you buy direct from Disney, I believe).
We paid a deposit (10% I think) and then, within a couple of days a box arrived from via FedEx. This contained the contracts to be signed and other important information. We also received a call from the Sales team to ensure we had the box and to go over any questions.
We signed the papers and returned them via FedEx in the supplied document wallet.
We then arranged a wire transfer of money from our Savings account to Disney. This could be done by credit card if you want the rewards or have a generous limit on your card.
The final bit was waiting for closing (January) but that was a formality and we could access the members website.
If you don't have a guide, I would recommend Jonathan. He has a very low-key but professional approach.
I believe that SSR is now "sold out" and that other DVC resorts are not openly marketed by Disney although you can buy there. The incentives were only offered on SSR and AKV and as SSR is said to be sold out, I imagine that AKV is the only resort offering incentives at the current time (but check).
Hope that helps.
Any other questions, get in touch.
John