Does your cable provider offer you on-demand viewing privileges? If so, as of today, you can watch Strange Powers: Stephin Merritt and The Magnetic Fields on demand, courtesy of FilmBuff. I have Comcast cable, and I found the film listed under "New Digital Releases" and "Indies & Foreigns" for $4.99. Go support this film, guys!!
Also, it's available for pre-order on iTunes today. So there are all sorts of avenues through which you can give your money to the film.