Anyone used these open source apps as a base to build on Titanium? Total newbie here - seems like this is the best place to be for mobile development!
A recent DrupalCon presentation covers this topic:
Yes. I use a customized version of Wordpress MU. With it, you can easily create an api that efficiently taps into the core and performs CRUD tasks via XML-RPC or restful.
In some situations, I map various calls directly through mod_rewrite to an existing WP plugin, bypassing the stack altogether. This allows for highly optimized routines while still having the resources available from WP.