Size Matters, Screen sizes that is

Screen sizes for your computer, laptop, iPad, iPhone, Android, and Blackberry.
Here are a few links on How to Create a Mobile Version of Your Website to test your website to make sure they work on your phone. Here is a good tips for you Mobile Website on your phone. Mobile Web Design: Overview, Examples and Tips
Applications and Tools to Assist You links are on the middle of the page.

HD 16:9
| 2560x1440 | 1920x1080 | 1366x768 | 1280x720 |

Wide 16:10
| 2560x1600 | 1920x1200 | 1680x1050 | 1440x900 | 1280x800 |

Full 4:3
| 1600x1200 | 1280x900 | 1152x864 | 1024x768 | 800x600 |

Android
| 1200x1024 | 960x854 | 960x800 | 640x480 |
480x432 | 480x400 | 480x320 |

iPhone and iPad
| 1024x1024 | 640x960 | 320x480 |

BlackBerry
| 480x360 | 480x320 | 360x480 | 360x400 | 320x240 | 240x320 |

Wordpress Mobile MobilePress

MoFuse allows a lot of customization: you can change colors and add new pages, logos and links to your mobile website. It also has its own tracking tool (like Google Analytics) to keep track of visitors. For a price of zero bucks, it has everything you could ask for.