So far, for 0.94, I have:
* a Cacti Threshold/Monitor datasource plugin
* one-way arrows
* INBWFORMAT/OUTBWFORMAT - change the format of BWLABELs
* poller_output/Boost support for RRD files in Cacti
Also, nearly-working test code for straight-line VIA links - so they go around corners rather than sweeping curves. This turned out to be quite hard to implement, and still isn't quite right for very sharp turns.
Still planned before 0.94 release:
* artificial icons - ICON 100 32 box, ICON 32 32 circle - to allow you to make diagrams a little easier. NINKs also make a comeback here.
* hopefully a new AJAXy editor