Joh,
I think the link does address the federal limit pretty clearly - it's one liter. If you bring in more than that then they can require you to pay duty.
See:
http://www.customs.ustreas.gov/travel/tobacco.htm

"One liter (33.8 fl. oz.) of alcoholic beverages may be included in your exemption if
You are 21 years old.
It is for your own use or as a gift.
It does not violate the laws of the state in which you arrive.
Federal regulations allow you to bring back more than one liter of alcoholic beverage for personal use, but, as with extra tobacco, you will have to pay duty and Internal Revenue Service tax."
And:
"For example, if your exemption is $400 and you bring back three liters of wine and nothing else, two of those liters will be dutiable."

The amount you can bring in subject to duty is limited by how much the state you are entering will allow. Here is a link to California's import limitations:
http://www.abc.ca.gov/PERMITS/PM_IMPORTING.SSI

Here's a link that tells you how to compute the duty:
http://www.customs.ustreas.gov/travel/know.htm#Paying Duty

jerry
Edited to fix link.

[This message has been edited by jerry a. laska (edited 12-11-2001).]

[This message has been edited by jerry a. laska (edited 12-11-2001).]