This will be short and to the point.
Below is an extensive (but not complete) list of manufacturers, outlets and stores offering goods made in America. Many are operated by union labor, to boot.
Please follow up in the comments if you know of other sources for locally made goods - I am maintaining this list and will add your finds to mine.
Vote with your money. Support American workers
Union-made goods first:
http://unionmadegoods.com 415-861-3373
http://nosweatapparel.com 877-992-7827 (I personally ordered from these guys - great service & clothing)
http://uniongoods.com 484-431-3244
http://tannergoods.com 503-922-1797 (also ordered from these guys - quality union made belts and other leather goods)
http://allamericanclothing.com 888-937-8009 (9am-4pm EST). Affordable prices, however union members (of any union) get an additional 10% off)
http://justiceclothing.com (888) 661-0620 (eastern time)
http://uniongoods.com 484-431-3244
http://unionusa.net 800-259-4580 (union made imprinting products)
http://unionmadepromotions.com (union made imprinting/promo products)
Domestics, Clothing, and General Merchandise
http://www.nortonsusa.com/ General merch. "we sell products only made in the USA"
http://www.shepherdsflock.com/ Slippers, hats, mittens, ear warmers and other products - made in VT!
http://www.etsy.com/ (small run clothing & crafts, thousands of seamstesses & artisans -- thanks jennifree2bme for the tip)
http://madeinusaforever.com/ 1-888-861-0365 (online department store - clothing, domestics, ect)
http://allamericanclothing.com 888-937-8009 9am-4pm EST (Jeans, Bottoms, Tops, Socks, ect)
http://americanapparel.net/ (store locator) (Clothing, accessories, made in Los Angeles, CA)
http://saveourcountryfirst.com dorky sounding name, but lots of domestic goods.. clothing, sporting goods, tools, toys, ect.
http://www.localharvest.org/... (thanks to jennifree2bme for the tip!)
http://cutco.com Large selection of kitchen and house supplies made in America. See this word of caution by shanikka
Shoes, Boots and Slippers
http://www.shepherdsflock.com/ Slippers, hats, mittens, ear warmers and other products - made in VT!
http://www.carolinashoe.com Carolina Shoe
http://www.chippewaboots.com/ Chippewa Boots
http://www.doublehboots.com Double H Boots
http://www.corcoranandmatterhorn.com Matterhorn Mining Boots
http://americanmadeworkboots.com American Made Work Boots - portal (lots of brands here)
http://www.usmadeshoes.com Capps Shoe Company
http://www.munroshoes.com/ Munro Shoes - these are very nice, well made shoes that will last. Not cheap, but not crazy expensive either. By the time you replace several pairs of broken & worn out $20 sweatshop shoes, you would have paid for a single pair of quality shoes made locally. Btw, I have tried these on in person and can attest to the fit & attention to detail.
Toys & Tots
http://www.all-americanbaby.net/
http://www.toysmadeinamerica.com/
http://www.toysofusa.com/
http://www.amerikid.com/
http://www.usmadetoys.com/
http://www.downtoearthtoys.com toys with a green focus, 90% products made in USA
Tools & Gardening
http://www.bullytools.com/ Shovels, hoes, rakes, shears, ect - 100% made in usa. (I personally have ordered -- good quality tools)
http://shop.nortonsusa.com/... Norton USA - hand tools, screwdrivers, pliers, pry bars, trowels, ect.
http://www.estwing.com (hammers, chisels, ect)
http://www.titanman.com/ cutting and drilling tools (bits, blades, ect)
http://www.floriantools.com/... pruners, shears, loppers, ect
Outdoors
http://ringoffirepit.com/ Fire pit rings - check these things out.. made in MN.
http://www.springbar.com/... Camping tents
Kitchen & Cookware
http://www.ceramic-source.com/... - mugs, glasses, tumblers
http://mugfactoryusa.com/... this company sells square mugs, mugs with hammer handles, if you can think of it they have it or can make it. Mugs, glasses, tumblers
http://web.me.com/...
Other sources to locate goods manufactured in America:
http://americansworking.com
http://ibuyusmade.com
http://madeinusa.org
http://madehereinamerica.com
http://buydirectusa.com
http://findusmade.com
http://madeinusa.org
http://usstuff.com
http://usamade.wordpress.com
http://orderamerican.com "Union Proud"
http://howtobuyamerican.com
http://usgoods.org/
News sources for domestically manufactured goods:http://madeinusanews.com
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UPDATE #1
List updated Dec 11, 2010 with new additions.