Finally - the guys in Wireless Toolkit group released a beta version of WTK emulator. This version is a reference implementation of MSA - JSR 248, so it comes with many cool APIs, like Location API (JSR 179), Scalable 2D Graphics (SVG - JSR 226), or Advanced Multimedia Supplements (sound and image effects - JSR 234).

You can download the beta version of the emulator from java.sun.com page, install it and plug it into NetBeans with Mobility Pack installed using Java Platform Manager from Tools menu. When set-up, simply choose WTK 2.5 as your platform emulator and start developing code for those new APIs :-).