<p>I am in the position of having to make a technology choice early in a project which is targetted at mobile phones.  I saw that there is a python derivative for S60 and wondered whether anyone could share experiences, good and bad, and suggest appropriate IDE's and emulators.</p>

<p>Please don't tell me that I should be developing on Windows Mobile, I have already decided not to do that so will mark those answers down.</p>

Have you checked out the
Mobile Python Book
?
This practical hands-on book effectively teaches how to program your own powerful and fun applications easily on Nokia smartphones based on Symbian OS and the S60 platform.
(source:
mobilenin.com
)