It’s good to see these companies moving in this direction. We took a look at the offerings and noticed one major difference. The Flakes from Pageflakes are exported in HTML code snippets while the minis are Flash widgets. This means that the Flakes will be limited in where they can be used (social networks do not allow this type of code) and the minis can be used just about anywhere (MySpace, Stickam, blogs, etc).
It will be interesting to see where these two companies take this and if other start page companies will follow.