Take a look at music.jonwarren.org. That is a live index of all of my music and you can download individual songs or whole albums.
I recommend a download manager (like DownThemAll for Firefox) which will let you download folders full of music easily. Otherwise you must right-click / ctrl-click and Save Link As.. individual songs which still isn't that bad.

About bi-monthly, I produce a mix called Run|Dance|Move. It is free and I put it out for the enjoyment of anyone and everyone who likes or might like upbeat mainstream club music. Take it with you running, dance by your lonesome, or with everyone else!
Usual Length: 60-70 minutes
Usual Speed: 131 BPM