ESRI has released AGX 900 with new ribbon technology. I am quite excited about this release except for one issue, which I'll get to later.
The AGX 900 SDK has been revamped. It is shiny and new, and now uses a flavor of background workers instead of the task and taskui classes. The use of background workers makes programming tasks very easy compared to the old way. Now here is the rub, though I love this product, it lack the capabilities to use published Geoprocessing tasks out of the box.
During beta testing of this product, I did not see many comments on if this point. I'm interested to see if AGX 900 will have an expansion pack to perform this.