Here is an article on the Speed Force but not really much info
http://en.wikipedia.org/wiki/Speed_Force
And here is an even better one:
http://www.hyperborea.org/flash/force.html
It has a couple of interesting theories and events that have happened involving the speed force. It seems to be possibly of a devine nature and have its own intellegence. There have been a couple references to it and God or Heaven so could it have a link to the Source as well???
* "Things became a bit more confusing during the Genesis crisis. Super-powered beings across the universe found their powers fluctuating due to a common source:
Ages ago, a great world destroyed itself and released into the birthing cosmos a wave of energy such as had never been known! This was the Godwave, and its power seeded all worlds with divinity. From this came the gods your worlds have come to know and worship. That Godwave expanded to the full limits of the universe, whereupon it doubled back on itself, and made a second passage through the universe. Out of the second passing came the potential for power in mortals. This power has been given many names...the speed force, the quantum field, the great energy once channeled by the Guardians of Oa.
—(Highfather, Genesis #2, October 1997)
Unfortunately, it is difficult to merge this view with the one previously shown. When Savitar sapped all the energy from the speed force, it took away everyone’s powers—each Flash, Jesse Quick and Impulse, even the Kapitalist Kouriers. Only Wally kept his speed because he was mainlining the force. Johnny Quick even merged with the field when they took the battle to Savitar. But in this latest crisis, everyone’s powers have become unreliable (or worse), including Wally and other non-speed metahumans...except for Jesse Quick[2]. We can probably assume this is just an error in Genesis."
* "The way the speed force seems to work is that it powers any super-fast being not naturally fast. A cheetah, for instance, is naturally fast. Superman’s speed is also a natural consequence of his Kryptonian heritage. All Flashes, however, have been normal people “noticed” by the speed force through accidents (lightning, supersonic flight, etc.) or intentional experiments (magic, steroids, etc.)."
* "One evening, at the absolute peak of his prowess, he felt the night lightning...calling him. Not with his eyes or mind—but deep in his heart—he sensed a strange beckoning...and chased it. Into the unknown, Windrunner raced faster and faster. He shattered all limits. He moved quicker than the hurricane, more swiftly than the thunderbolt...faster than light itself. Reaching supreme velocity, he approached the threshold of a new communion. For a span razor-thin even to him, Windrunner touched the very source of his great power—and was transformed. The speed force drew Windrunner in...without words, inviting him to the other side of light, to become one with the power...as others had before him.
—(Max Mercury, Flash v.2 #97, January 1995)
Windrunner hesitated at the last moment, and lost his chance at heaven. Propelled forward through time, he landed in 1891. “He had locked eyes with God—and had blinked. From that day forward, he was burdened with an empty ache more painful than the greatest dream dashed...or the greatest love lost.” Windrunner tried many times to recapture that moment, each time arriving in a new era, until he became the present-day Max Mercury."