Spurred by the scarcity of the PlayStation 3, hungry consumers are buying all the PSP and PS2 units they can get their hands on. The PSP's sales have shot up by 280 percent over last year, while the PS2 was up a respectable 115 percent. From the Eurogamer article: "Additionally, sales of first-party software are also up, according to SCEA. PS2 game sales rose by 120.6 per cent, with PSP software sales increasing by almost 168 per cent. Sony has yet to publish figures for exactly how many PlayStation 3 units have been sold in North America since the console launched there on 17th November."