Tunecore just announced that they will distribute one single song, or a single, to all of their distribution channels (iTunes, AmazonMP3 and so on) for a flat fee of $9.99 per each year.
This is indeed a good pricing for anyone who knows that they want to just sell one entity and expect to get more than that cost in revenue. Or at least dip the toes into distributing a song and see what happens.
I personally think that the whole concept of albums in this age of digital download will become a lesser issue. Long time ago — and we all know that — many songs on LPs were fillers just to get the necessary 20 minutes per side in place. Especially the other side, end part, used to have miserable music.