Currently, the shipping estimate for a new base mini purchased direct from Amazon (not a marketplace or third-party seller) is 1 to 2 months (!). 
However, it's not actually taking that long. I placed my order on the 22nd, and the next day, the 23rd, I got this email:
'Hello,
We have good news! We're able to get this part of your order to you faster than we originally promised:
"Apple Mac Mini MC815LL/A Desktop (NEWEST VERSION)"
Previous estimated arrival date: October 17 2011 - November 21 2011
New estimated arrival date: September 29 2011 - October 04 2011'
So, feel free to order from Amazon, as they are not really making people wait as long as it seems.
I was considering going with B&H Photo or Adorama Camera instead, since they would also be no tax and free shipping, but I prefer Amazon.
However, it's not actually taking that long. I placed my order on the 22nd, and the next day, the 23rd, I got this email:
'Hello,
We have good news! We're able to get this part of your order to you faster than we originally promised:
"Apple Mac Mini MC815LL/A Desktop (NEWEST VERSION)"
Previous estimated arrival date: October 17 2011 - November 21 2011
New estimated arrival date: September 29 2011 - October 04 2011'
So, feel free to order from Amazon, as they are not really making people wait as long as it seems.
I was considering going with B&H Photo or Adorama Camera instead, since they would also be no tax and free shipping, but I prefer Amazon.