I feel like I'm a little late to this game, but I've finally started a Society 6 account. They do custom art prints on a wide variety of products, everything from prints to wood blocks to laptop sleeves to leggings. I haven't put a wide variety up yet, all patterns I've done that work nicely for things like duvet covers and shower curtains, but I'm planning a few things to create in the next few weeks that will print nicely. Check it out at Society 6.
I'm pretty excited because it's really cool to see designs on large-scale products and know people are enjoying them in their homes. I've bought a shower curtain from a difference artist, which should be here soon and then I can enjoy the same feeling with someone else's work!
They do sales and promotions regularly, so check out the website frequently because there's always a code for discounts at the top.