I wrote some time ago about the growing confusion around companies providing "open source" variants of their products.
Last week David Berlind of ZDNet wrote an interesting article suggesting that companies were "abusing" open source by creating their own Open Source licenses. Its hard to see how this trend to share technology creates an abuse of the Open Source world but as I wrote back in September, it does create a lot of confusion.
Some of the quotes in the ZDNet article highlight the problems - the original Open Source license didn't contemplate some of the newer technologies (browser based applications as an example) that are being developed.
The Open Source Initiative has compiled a list of "approved" open source licenses - its a long list - add in the open source licenses authored by companies and you can see how confusing (and littered with legal landmines) the landscape has become.