I need to regularly move about 500 - 1000 pounds of goods from
Colorado to Europe.  I need the names, website, and phone numbers of
at least 4 freight forwarders I can contact to get quotes to pickup
the goods in Denver and deliver to London or other European cities. 
The goods are usually in pallets so USPS and UPS are not good options.

Hi holstein13,

Using the power of Google, I've assembled a list of nine freight
forwarders which appear well-matched to your needs. I am not
personally in this business, so you'll have to be the final arbiter of
that assertion, but here they are:

The Seariders Group
3301 Southeast 14th Avenue
PO Box 165179
Port Everglades, Florida 33316
Phone: 954 764 0616
Fax: 954 764 0855
Email: searider@seariders.com
http://www.seariders.com/services.asp

Affiliated USA
2128 South Wolf Road
Des Plaines, IL 60018 
Phone: (847) 759-1847 
Fax: (847) 759-1864 
Email: chicago@affiliatedcb.com
http://www.affiliated.ca/

Air-Pac Freight Carrier, Inc.
4443 North Hwy 67
Florissant, MO 63034
Phone: 314-533-1142
Email: info@freightforwarders.org
http://www.freightforwarders.org/index.htm

Argents Express Group
2801-03 Coyle Ave 
Elk Grove Village, IL 60007 
Phone: (888) 982-4422 toll free 
Phone: (847) 364-6460 
Fax: (847) 364-0901
Email: chicago@argents.com
http://argents.com/ 

FreightLand.com
P.O. Box 566
Skippack, PA 19474
Phone: (800) 565-5357
Fax: (610) 584-1751
http://www.freightland.com/ 

Global Logistics Associates
c/o Charles M. Schayer & Co. 
Address: 3839 Newport Street
Denver, CO 80207 
Phone: 303 399-5160 
Fax: 303 393-7084 
Email: denver@schayer.com
http://www.comwave.nl/nieuw/database/as/Glassociates/offices.asp?vGo=True&region=North
America

Cartwright Transportation Services
11901 Cartwright Avenue
Grandview, MO 64030
Phone: 800-821-2334
http://www.quick-ship.net/
 
TheShippingManager.com
http://www.theshippingmanager.com/
 
World Class Shipping
1510 Midway Court E201
Elk Grove Village, Illinois 60007
Phone: 847-956-SHIP(7447)
Fax: 847-228-1305
Mobile: 630-747-4690
http://www.worldclassshipping.com/ 

As I said above, I'm not personally familiar with the businesses
listed here, but a quick phone call to each of them from you should
determine if they can adequately and economically handle your needs as
their websites indicate they can.

If you have any questions about this answer or any of the links
contained within it, please use the Google Answer Clarification
feature to contact me for additional information before rating the
answer.

Thanks for your question,

ericynot-ga

Google search - united states "freight forwarders" or "freight
forwarder"

Good job, six of the nine indicated that they would do this for us. 
Unfortunately, I had to call them to find this out and that is why I
am awarding 4 stars rather than 5.