Google has always had a significant amount of cash. They used to use that capital to do really interesting, strategically smart things, like buying dark fiber. This was similar to Apple's philosophy - you don't see Apple distracting themselves with some sort of "Apple Ventures" play; instead, they will take advantage of their cash position to do things like cornering the market for miniature hard disks, which leads to a direct benefit to the bottom line.
Methinks there are too many cooks in the kitchen.
Btw, is this typical of corporate venture funds or is Google trying something new?
I don't see why that would be true. Nearly any web company might one day "compete with Google", which would rule out a lot of potential startups. Investing in or buying out a competitor is a long-established strategy used by many companies.