I use YouTube on my iphone to queue up and listen to songs I want to hear. TO find songs I want to hear while driving I speak into Google, "Artist, Song, Youtube," to bring up the result, click & listen.
You can find some decent quality sounding versions of songs you want to hear; albeit some are crappy quality too. You can later access those songs in your YouTube iPhone app history.
This put.io sounds cool, but for me I dont download mp3s anymore and when I had a hard drive full of them I did upload them once to streamload.com but that took forever.
Putting the number of 'slots' available on the signup page is interesting. I wonder what the rationale for this is ... and it lets you infer what rate of signups they are getting (assuming it isn't just a marketing gimmick).
The fact that premium is just twice the pro limits but costs slightly more than 2x premium stands out as a little odd. Why not offer incremental storage capacity in the same way as bandwidth?
I wonder what the legal implications of this are. Here in the NL, downloading movies/music is legal, but uploading can cause you trouble. If put.io seeds a movie torrent for you, can you get into trouble?
That's not really an answer (and, btw, not really honest -- location, isp and ip don't matter if they have your email address). Just because something can't be tracked doesn't mean it's legal.
Their "speedtest.bin" file downloads at 175 KB/s for me on my 2 MB/s connection, so no deal. Granted I'm in Australia, but using Rapidshare or Usenet directly I can max out my connection.
Not even a video demo or trial account.