Recently I built Exuberant Ctags package for OS2008. It might be useful for all who develop directly under Scratchbox using VIM. Ctags offers a possibility to explore methods from the opened files similar way as IDE (see screen-shot).
The CTag package can be found on the download page under section Packages for Nokia770/N800/N810. The config file for VIM with supporting of CTags can be downloaded there as well.