Links

Applications

Mobile Gmaps - http://www.mgmaps.com/index.php

Opera Mobile - http://www.opera.com/products/mobile/operamini/

Pang - http://www.midlet.org/results.jsp?search=pang

Tastephone - https://tastephone.dev.java.net/

Design

Usable Products - http://usableproducts.com

Mobile Web Design: Tips and Techniques - http://www.cameronmoll.com/archives/000577.html

Tools

Windows

Eclipse - http://eclipse.org

EclipseME - http://eclipseme.org/index.html

PalmOS - http://www.palmos.com/dev/tech/java/developers.html#01a

Mac OS X

Eclipse - http://eclipse.org

http://mobiko.blogs.com/mutant/mac_osx/index.html

http://developers.sun.com/techtopics/mobility/midp/articles/osx/

http://www.justobjects.org/blog/?p=10

http://www.urbanhill.net/midp/

Linux

Eclipse - http://eclipse.org

Multi Platform

J2ME Polish - http://j2mepolish.org

Obfuscators

Proguard - http://proguard.sourceforge.net/

General

http://microjava.com/

http://developers.sun.com/techtopics/mobility/device/

Blogs & Forums

Pasta & Vinegar - http://tecfa.unige.ch/perso/staf/nova/blog/

Series60 Multimedia Blog - http://blogs.s60.com/s60multimedia/index.html

Textually - http://textually.org/

NGPhone - http://ngphone.com/

Moconews - http://www.moconews.net/

Engadget Mobile - http://engadgetmobile.com

Phonescoop - http://phonescoop.com

GSM Arena - http://gsmarena.com

Howard Forums - http://howardforums.com

Wikipedia - http://en.wikipedia.org/wiki/Mobile_development

Application Providers

GetJar - http://www.getjar.com/software/

Handango - http://handango.com

MidletReview - http://www.midlet-review.com/

Play online - http://www.midlet-review.com/index?content=playonline/play

Midlet.org - http://midlet.org (lots of free MIDlets here)

Carriers

Wikipedia has a fantastic list - http://en.wikipedia.org/wiki/List_of_mobile_network_operators

MVNO's - http://en.wikipedia.org/wiki/Mobile_Virtual_Network_Operator

Manufacturers

Danger

Corporate - http://danger.com/

Developer Site - http://developer.danger.com/

Motorola

Motorola - http://motorola.com

Developer Site - http://developer.motorola.com/?path=1

Nokia

Nokia - http://nokia.com

Developer Forum - http://forum.nokia.com

Software Update - http://www.nokia.co.uk/nokia/0,1522,,00.html?orig=/softwareupdate

Palm

Corporate - http://www.palm.com/

Developer Site - http://www.palmsource.com/developers/

Samsung

Corporate - http://samsungwireless.com/

Developer Site - http://developer.samsungwireless.com/singlelogin/

Sony Ericsson

Corporate - http://sonyericsson.com

Developer Site - http://developer.sonyericsson.com/site/global/home/p_home.jsp

Mailing Lists

http://mobiledesign.org/

http://mobilemonday.com

NY Chapter - http://www.mobilemonday-ny.com/

Mo List - some heavyweights on this list - it's an interesting overview of mobile trends - http://www.mobilejones.com/archives/2129/