Joe
Good question.
Cynical answer - take the date that PTC announce and then add on a few months.
Realistic answer - sometime next year - March/April 2006 is the latest I've heard. At one point there was talk of late 2005, but in an effort to do a good job of QA this has been pushed back a bit.
All the best with your UG / Mechanica issues. At one point many years ago this was a very high priority topic for Rasna, but there are not a huge number of UG & Mechanica users left thesedays. If you do have the option of using Pro/E to generate your geometry then you'll find it much slicker. Otherwise your best source of help will be Mechanica experts within Boeing (probably at your site), and PTC Tech Support.
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David Reid
Optima Design Services Ltd
davidr@optima-design.co.uk