We'd like to get there eventually. Phan populates a sqlite database when analyzing code (if run with the -s flag). This allows fast runs on single file changes or patches. We're hoping to use this for things like auto-complete and finding callers for a class/method/whatever eventually.
For now, we have a primordial Syntastic vim plugin (https://github.com/etsy/phan/blob/master/plugins/vim/bundle/...) for getting errors into the quickfix view.