Rovio's Angry Birds made their entrance to the Series 40 with the Asha lineup of devices announced on Nokia World. If you have missed it Engadget has a post and video that features the mighty eagle showing off Angry Birds on Asha 303.
Angry Birds performs so well on these so called feature phones that it got people puzzled. I guess many people do not expect much from JavaME, therefore there had been questions whether this is actually a JavaME application or did Nokia open up its C libraries, or some other secret API to Angry Birds.
It is a well developed JavaME application! It does not even need access to APIs that are available to manufacturer/operator signed MIDlets. Below is a list of usual suspect APIs that Angry Birds uses as you can see it is a list of APIs that are available to any JavaME developer that targets Series 40.