The workflow-ng and UPS modules are both enabled. I have only one delivery type enabled for UPS but I've tried several permutations of that preference.

It doesn't appear to me that the right function is being called for a shipping quote. I added an error_log() function at the top of all UPS functions in the UPS module with the name of the UPS function as the argument. Here is the list of functions that were called when I tried to get a shipping quote:

-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-ERROR LOG
Tuesday, May 13, 2008 9:12:37 PM US/Central
[Tue May 13 21:12:39 2008] [error] [client ::1] uc_ups_menu, referer: http://localhost/rmm/trunk/duckbill/cart/checkout
[Tue May 13 21:12:39 2008] [error] [client ::1] uc_ups_shipping_method, referer: http://localhost/rmm/trunk/duckbill/cart/checkout
[Tue May 13 21:12:39 2008] [error] [client ::1] _uc_ups_service_list, referer: http://localhost/rmm/trunk/duckbill/cart/checkout
[Tue May 13 21:12:39 2008] [error] [client ::1] _uc_ups_pkg_types, referer: http://localhost/rmm/trunk/duckbill/cart/checkout
[Tue May 13 21:12:39 2008] [error] [client ::1] uc_ups_nodeapi, referer: http://localhost/rmm/trunk/duckbill/cart/checkout
[Tue May 13 21:12:39 2008] [error] [client ::1] uc_ups_shipping_type, referer: http://localhost/rmm/trunk/duckbill/cart/checkout
[Tue May 13 21:12:39 2008] [error] [client ::1] uc_ups_shipping_method, referer: http://localhost/rmm/trunk/duckbill/cart/checkout
[Tue May 13 21:12:39 2008] [error] [client ::1] _uc_ups_service_list, referer: http://localhost/rmm/trunk/duckbill/cart/checkout
[Tue May 13 21:12:39 2008] [error] [client ::1] _uc_ups_pkg_types, referer: http://localhost/rmm/trunk/duckbill/cart/checkout

-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-HEADERS
Here is the info posted in the ajax call as well as the headers from both call and response:
Response Headers
Date Wed, 14 May 2008 02:21:09 GMT
Server Apache/2.2.8 (Unix) DAV/2 PHP/5.2.5
X-Powered-By PHP/5.2.5
Expires Sun, 19 Nov 1978 05:00:00 GMT
Last-Modified Wed, 14 May 2008 02:21:09 GMT
Cache-Control store, no-cache, must-revalidate, post-check=0, pre-check=0
Content-Length 4
Keep-Alive timeout=5, max=100
Connection Keep-Alive
Content-Type text/javascript; charset=utf-8
Request Headers
Host localhost
User-Agent Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5; en-US; rv:1.9b5) Gecko/2008032619 Firefox/3.0b5
Accept HTTP Accept=text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language en-us,en;q=0.5
Accept-Encoding gzip,deflate
Accept-Charset ISO-8859-1,utf-8;q=0.7,*;q=0.7
Keep-Alive 300
Connection keep-alive
Content-Type application/x-www-form-urlencoded; charset=UTF-8
X-Requested-With XMLHttpRequest
Referer http://localhost/rmm/trunk/duckbill/cart/checkout
Content-Length 461
Cookie SESSb386a9027316fca55bbe6082fba3b4e2=11b64e7f60c5cad22a99670bee881c22; SESSd69f59dbe4f20cdf615cdd72d2ff4f86=20d75acfb661bb4138c3be7ecea3f524; PHPSESSID=06285b4457e7c5a75e550b8c0eb28adc

-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-POST
uid=1&details[address_select]=0&details[country]=840&details[zone]=&details[first_name]=&details[last_name

]=&details[company]=&details[street1]=&details[street2]=&details[city]=&details[postal_code]=&details

[phone]=&products=9%255EDuckbill%2BMoney%2BClip%255EDB01%255E%255E2%255E5.00%255E33.00%255E1%255Ea%253A2

%253A%257Bs%253A6%253A%2522module%2522%253Bs%253A10%253A%2522uc_product%2522%253Bs%253A9%253A%2522shippable

%2522%253Bs%253A1%253A%25221%2522%253B%257D

-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-RESPONSE
[ ]

You reply is SO appreciated!
Troy Dalmasso