Over the last year, all of the big three tech companies (Microsoft, Google, and Yahoo) have created their own online mashup editors. Both Microsoft's and Yahoo's are publicly available, but Google's is in a small private beta. Today I'm taking a look at the pros and cons of all three.
Jumping to the conclusion:
After looking at all three of these mashup editors, I have found that the easiest one to use, by far is Microsoft's Popfly. It provides a really easy entry point for those who want to get started in developing Web applications.