There was a great post from David Shen on VentureBeat yesterday on how the ease of starting Internet businesses has created an abundance of "me too" products.
As opposed to judging these products as not being innovative, David gives a list of ways that a startup playing in a space with proven competitors might innovate the idea / attack a crowded market:
1. Innovate on the product experience (ie. Posterous vs. Wordpress).
2. Business model changes, where you are going free (or freemium) for a product that’s usually subscription (or fixed charge).
3. Changing the market where you’re going long tail instead of hitting the larger market (ie. casual games versus hardcore games).
4. Change in distribution model, where you are delivering something as a service rather than a download, or bundled into an existing thing (ie. Facebook app) instead of a standalone thing.
5. Change in branding. An example is where you cater to an upscale prestige market or niche market instead of a mass brand, or vice versa like taking a niche product and making it available to the masses.
6. Create a business that is better, out of a larger part of another business (ie. Lefora created a message board hosting product for those who don’t want all the bells and whistles of a full social networking product).
7. Innovate on design, which appeals to those who want a similar product but one that looks/feels better.
8. Offering more features on a product, or customization on product.
And the big, traditional way of taking a new entrant into a crowded market:
9. Mass advertising to gain broad awareness and induce trial and adoption of new product in face of existing competitors.
I thought this was a pretty good list.

