I couldn’t find a convenient and free way of accessing aviation METAR, TAF and AIRMET reports on my Blackberry, so I created a couple HTML front-ends to the NOAA National Weather Service Aviation Weather Center Aviation Digital Data Service (ADDS) site that are mobile-optimized for screen size and bandwidth.
I live in the South Bay Area, so I defaulted the values to my region. But you’re welcome to do View Source …, copy the HTML and customize your own forms.

ADDS METARs UI by James

ADDS AIRMETs UI by James
I’ve been happy with the free AccuWeather mobile UI for viewing radar and satellite images. It’s already conveniently optimized for mobile phones, so I made no effort to deep-link into any such products.
Update 2010-11-13: metars.html and airmets.html have been updated with the new ADDS and AccuWeather links.
NOAA NWS Aviation Weather Center Aviation Data Service (ADDS)
Weathermeister



Have you looked at MyMetar.com? http://www.mymetar.com/ You can set up your own page and then view that data on your mobile.