MobileVB Solo from Appforge is now available for the Series 60 and other platforms. The Solo programs allows you to develop programs for one platform (rather than the multiple platforms you have with the full MobileVB). By purchasing for just one platform there is a considerable cost saving for the developer.

MobileVB Solo is available for the following Symbian platforms:
Series 60
Series 80
UIQ

Appforge Mobile VB information (from website):

No mobile application development software is faster, easier, or more productive to use. MobileVB Solo software integrates seemlessly into Visual Basic 6.0 enabling you to immediately write applications, using the Visual Basic programming language, that will run on over 90% of the world's handheld, mobile, and wireless devices.

Palm OS, Pocket PC, Windows Mobile 2003, Nokia, and Symbian UIQ developers use specialized MobileVB controls, libraries, and modules to create applications within the Visual Studio IDE. MobileVB Solo ships with more than 30 standard controls, as well as modules and libraries for database synchronization, telephony, and gaming. MobileVB Solo applications can be tested from within the IDE and compiled into single-file installation packages for distribution.

MobileVB Solo is a single platform software solution enabling mobile developers to easily create smart applications that run on that platform. Solo products include:

MobileVB Solo for Palm OS
MobileVB Solo for Pocket PC 2000 / 2002 and Microsoft Windows Mobile 2003
MobileVB Solo for Nokia Series 60
MobileVB Solo for Nokia Series 80
MobileVB Solo for Sony Ericsson UIQ Smartphones