As you may or may not know, Producteev is shutting down in May. We were in the same pickle as all of you with so many tasks.
One user mentioned "Asana" as a replacement. Sure enough, we checked it out, signed up, and it is EXCELLENT! Better yet, it has a feature to import all of your producteev tasks (you will have to re-assign them to users).
Plus there are additional features that make it even a better product than Producteev was. There is a $7 or $10 per user monthly fee, but well worth it.
thanks for the information.
With which tool did you exactly import the tasks? I saw that there are various apps to do so - but I am interested in how you exactly did it as it worked well for you.