I see that many times on this newsgroup, some people
seem to suggest that multiple rounds of chemo is useless
and that further treatment should not be pursued.

   They are entitled to their opinion of course.

   Here is a recent study which seems to argue against
the extreme pessimists.  

  The final decision rests with each individual patient.

http://www.asco.org/ac/1,1003,_12-002643-00_18-0034-00_19-0032863-00_28-
002,00.asp

Meeting: 2005 ASCO Annual Meeting       Abstract No: 5136

Background: Various types of chemotherapy have been studied in patients with
refractory/relapsing ovarian carcinoma. However there is very limited
information regarding the usefulness of chemotherapy in ovarian cancer
patients who have received several lines of treatment.

[...]

Conclusions: Disease response or stabilization occurs in about a third of
patients receiving 3rd line treatment. The type of response to 2nd line
therapy (Topotecan in this study) can help predict the responsiveness and
perhaps usefulness of subsequent chemotherapy.
   This is the first study to show that median [overall survival] is
significantly improved in responders compared to non-responders in women
receiving 3rd line therapy for ovarian carcinoma.