Anne,
Check this thread about the new TOEFL-TSE. As far as I know, there won't be TSE in July and Aug 2005.(not confirmed)
http://www.urch.com/forums/showthread.php?t=19085 (new TOEFL will include Speaking part)
For the next generation TOEFL-TSE, those who want to take TSE must retake both TOEFL-TSE.

If the situation is the same, those who used to pay $125 to retake only TSE must pay over $200 and retake TOEFL-TSE. If the raters graded TSE as toughly as it used to be, I would say that the number of the test takers who want to take the test would reduce dramatically.
Moreover, it takes some time for candidates and tutors to get used to the new generation TSE and do well on the new TSE.
Knok