Stores seem to move their current ad page around on their websites a lot. So if any of these links don't work, just look around on the store's home page and you'll probably find a link for their ad.

food:

Giant Food

Harris Teeter  Special promotions are available if you signing up for their e-VIC program.

Healthway Natural Foods Coupons for items you select are emailed to you.

Magruders You can sign up to receive ads by email.

My Organic Market Look for the "Store Flyers" link on the homepage. You can sign up for monthly ads by email.

Safeway Just enter your zip code.

Whole Foods Market You can receive notification of some sale items beyond what's in their regular flyer, by signing up for their email newsletter. Be sure that the local store news and sales" box is checked; you can uncheck other boxes to reduce the amount of email you get.

stuff:

Best Buy You can check inventory on many items at specific stores online. Look for "check stores" for a given item you're interested in.

Home Depot Be sure to check the location their site assumes your at; it seems to misidentify location sometimes.

Kohls Be sure to check the location their site assumes your at; it seems to misidentify location sometimes.

Kmart  Sign up for email savings with Kmart

Lowes

Macys

Sears On some items, you may be able to check inventory on many items at specific stores online.

Target You can check inventory on many items at specific stores online.

Walmart You can check inventory on many items at specific stores online.