We're completely taken with Paola Navone's graphic update of a classic Beni Ouarain carpet. Available through Habitat in the UK, the ingenious rugs are designed with velcro strips that allow them to be customized and arranged as one large floor covering... They are sold in sets of three, for about $350. Though they don't seem to have made it online at this point, we understand they will be available this autumn.
Also surprisingly affordable, The Conran Shop sells these two striking versions of traditional flatweave kilims; "Fez" and "Marrakesh". Both are a great size (60" x 83" and 71" x 106", respectively) and are sold for under $500.