I'll chime in on the two-product plan here.
The way I read it, TS2009: World Builder's Edition will be the complete set. Driver, Surveyor, Content Manager, the whole kit-n-kaboodle. In fact, it says so right here:
TS2009 will include the familiar Surveyor, Driver, Railyard, Content Manager and Content Creator modules and of course the new Trainz Online module.
Lest we get confused and think "TS2009" in this quote refers to the combination of the two products, look further down the page, where apparently "TS2009" and "TS2009 Engineer's Edition" are two seperate products.
Following the release of TS2009 we will be working with a number of content creation groups to develop the best quality routes ever seen, for inclusion in Trainz Simulator 2009: Engineers Edition (TEE)
So it seems to me that Trainz 2009: World Builder's Edition (shortened to TS2009) will be the complete package, released this November as the next big release of Trainz. By the looks of it, TS2009 will include a lot of legacy content from previous editions (to ensure backards compatibility) while being somewhat sparse on the new content (conjecture, it doesn't actually
say this but it's my assumption), similar to the pre-TRS2006 releases.
Then, sometime next spring once creators are getting the hang of creating pretty routes and content using TS2009's capabilities, Auran picks the best of the best available at the time and releases them as
TS2009: Engineer's Edition, which, to me, seems almost analogous to TRS2006: Driver's Edition (i.e. no Surveyor) plus a limited version of Content Manager to download new routes.
In summary, as far as I can tell, TS2009: World Builder's Edition will be the big, complete release, while TS2009: Engineer's Edition will be the new Driver's Edition plus a content manager.
If Tony, Chris, Rob, or anyone else at Auran could step in and confirm/deny this I'd be greatly appreciative
