One other thing, the original deal was that Ranma wed _a_ Tendo
sibling.  There are two perfectly fertile and unattached young women still
in the Dojo for Nodoka to draft....

   Can you see anyone drafting Nabiki?  And Kasumi is impervious to all
external forces.  Not even Happosai glomps her.  I don't think he glomps
Nabiki either, but that's because he doesn't have a death wish. 

Ok, ok, so I left a plot hole... please forgive me!!!
actually though, the reasons Nodoka had Ranma commit seppuku do still
work, as Ranma wasn't manly enough to keep his fiancee faithful to him,
and Nodoka was very set on Ranma and Akane's marriage, so it came as an
espessially staggering blow. Wether or not the engagement could have been
transferred is kinda moot, although I admit I did make a mistake by not
making that clear... I'm sorry!!

Ryan