I admit it is stale, but it is not dead, not yet :)
Actually what happened is that, given the economic downturn, last year I though I should not refuse any of the jobs I was offered. I finally ended up with so much work that I had no time left for this project. I expect things to slow down in the next months so that I will be able to dedicate a significant amount of time to the DITA-OP.
In the mean time, the nightly build of the editor has the latest bug fixes and enhancements. Especially it has a new ditamap editor. Unfortunately some users have reported issues with the Galileo release of Eclipse. I guess this is the first thing I will have to check.
See you soon,
Claude