Особо интересные выделил жирным. Можете опробовать некоторый функционал скачав WTK 2.5 там много примеров из новинок.
Довольно обширная спецификация:
Java 2, Micro Edition, Java MIDP 2.0
Mobile Services (JSR 248)
Java API for Bluetooth™ (JSR 82)
Wireless Messaging API (JSR 120/205)
Web Services (JSR 172)
PDA Optional Packages for J2ME
Platform (JSR 75)
JSR 234 Advanced Multimedia Supplements API
Mobile Media API (JSR 135)
Java Technology for the Wireless Industry (JSR 185)
MIDP 2.0 (JSR 118)
CLDC 1.1 (JSR 139)
Mobile Services Architecture (MSA) umbrella standard JSR 248:
Security & Trust Services API (JSR 177)
Location API (JSR 179)
SIP API for Java ME (JSR 180)
Mobile 3D Graphics API (JSR 184 1.1)
Content Handler API (JSR 211)
Scalable 2D Vector Graphics API for Java ME (JSR 226)
Payment API (JSR 229)
Mobile Internationalization API (JSR 238)
Sony Ericsson additions; not mandated in MSA:
Java Binding for the OpenGL® ES API (JSR 239)
Mobile Sensor API (JSR 256) for accelerometer applications
Java 3D 1.1
Mascot Capsule Micro3D Version 3
Mobile 3D Graphics API for Java ME (JSR 184 1.1)
http://developer.sonyericsson.com/site/global/newsandevents/latestnews/newsmarch07/p_z750_firstjp8phone_msa.jsp
