Spelljamming the planes?

Howdy all :)

I recently pulled out my wallet and decided it was time to invest in
one of the new TSR campaign settings.  I got myself all the
planescape gear and generally I'm happy with it.  I have an old copy of
the manual of the planes but i feel that this is a bit out of date
now and the new gear brings it up to speed, at least in practical
gaming terms.

One thing I was wondering about, though, was whether anyone had given
spelljamming in the planes any thought?  It seems like the ideal mode
of travel anywhere to my mind :)  Naturally a ship wouldn't fit
through most of the planescape portals but I can't see why
spelljamming wouldn't work as well in the Air Elemental Plane as in
the Prime.

I'd be interested to hear your views.  I know that this may change
the flavour of a spelljammer campaign but that can sometimes be
useful for a bunch of world weary ultra-experienced characters :)

And also, dont worry, I'm not proposing that we give spelljamming the
flick.  In fact - I'm trying to think of an innovative way that we
can make it survive :)

Yours in peace and friendship,

Ben Harris.