After two rounds of chapter 11 bankruptcy, in 2009 Polaroid exited the film market, despite the niche market that still exists. Remaining packs of Polaroid film, including expired packs, fetch insane amounts of money on eBay.
In the meantime, the corpse of the Polaroid Corporation is being raped by Lady Gaga. The company re-entered the instant film market in 2010; although initially announced to be the return of 600 film, the end-result was really the Fujifilm Instax camera and film in drag.
Most older "pack film" cameras can still be used; they accept Fuji's FP-100C color, and/or FP-3000b black and white films.
New film for the "integral film" cameras has been re-invented and released by The Impossible Project, but is still under heavy-development.