http://www.getcashboard.com/

Saw that they sponsored Rails Rumble and was a bit intrigued. Even more interesting is their claim that:

Our customers have tracked 2,003,595 hours and collected $266,643,144

Given that this whole financial/time management for businesses space seems to be so saturated to me, my question is how long is the long tail really?

How many of one specific type of business can thrive on the internet? It seems that from the financial management perspective, many can. They probably will not be the next mint.com or have a major exit, but they will likely produce very solid/respectable cash flows from now and into the future.

So I guess my real question is how do you measure if a particular industry is over-saturated? I would have thought that this industry was over-saturated years ago, but the more I discover competitors makes me think I was wrong.

It either proves the theory that it is over-saturated - the mere presence of too many competitors - or proves that it is not - the mere presence of new entrants.

Which is it and how do you know?