Has any one used Flex 1.5 for mobile apps?

I know it's now Flash Builder 4 and it is great, but Flash Player for Mobile on Nokia is still quite not up to AS3. My audience mostly has quite old Nokia phones that support FP 7-8. Do any of you have expe开发者_C百科rience with Flex 1.5 to create mobile apps? Is my idea reasonable, or should I expect big problems if I go down this path? I plan to use it to develop components like DataProviders for tables/lists and charts.

Here are some alternatives:

• OpenLaszlo
• SVGT for Mobile(JSR-226)
• XULMidlet