MidwayUSA is offering $20 off orders with $100 of regularly priced items, with no limit on the number orders. The key is regularly priced- any item that is on sale doesn't count toward the $100 total. The only problem is that I had to create two orders because I was buying over 200 bucks worth of stuff and I wanted to save as much as possible. Ultimately, I only ended up saving about $5 after shipping and handling charges on the two orders.
So basically, MidwayUSA is offering free shipping on orders over $100. But I love Midway's selection and service, so I'm good with any rebates I can get.