Hello there.
I also have great interest in whether this converter works / was completed. I have several eBlah forums, all quite small with less than 50 members. I'm very keen to migrate away from eBlah, and since Simple Machines developers appear to have made the most headway in building a converter, embracing Simple Machines would seem the best approach.
Can anyone confirm whether the converter was ever completed for eBlah 10.3.6?