What you put on your walls says a lot about who you are, all of which would devastate your mother, so definitely don't respond to her friend request. For personalized real-wall products you'll be proud to show off, hit ixxi.
Just launched by a Dutch design trio, ixxi's an awesome
bicycle made from wooden clogs, windmills, and legalized prostitution wall-art concern that can enlarge any image and divide it into a collage of high-quality matte “pixel” sheets you can assemble yourself. Upload a pic/design (or choose from their bank of high-qual stock art), plug in your wall dimensions to find the most appropriate size for the assembled product (up to 8'x8'), and it’ll generate a preview you can tweak using rotate, shift, and zoom tools, which you'll want to use liberally on any photos of your own. Their name comes from the "x" and "i" mounting brackets that invisibly connect the tear-resistant sheets, which can be applied to almost any wall using the included "power strips", or even hung from a curtain rod to create a room divider, in case your statement that robots are cooler than ham didn't divide the room enough already.
Should you want to get more abstract, you can forgo a unified image in favor of creating a tiled collage of various ones, though pull any of them from Facebook and you can stop looking forward to poking your mom.