Widgetbox, which released its App Accelerator for the quick creation of Facebook apps, has a few upgrades to this new tool. You can now create fully functional flash applications for use on Facebook profile pages, which greatly extends the capabilities of a Facebook app for the spot where it's most likely to be seen by others.
It's not surprising that this was the top request from developers for App Accelerator. You can now fully customize Facebook news feeds and friend invites, including the ability to customize images and text. There's also the ability to link user activity to Facebook news feeds, meaning you can do things like show the status or game score for a game widget directly in the feeds.
It's clear that Widgetbox is improving its developer tool so that more people can create fully functional. professional and highly-integrated applications for use on Facebook. This continues to lower the barriers to entry for those that would like to make a Facebook app, and will likely be a common offering from other widget creation services and others that would like to provide means for a wide range of people to make applications on open platforms.