Spelljammer and Greyhawk

Here's a question I also posted on the newsgroup.  For those of you who
combine your spelljammer with the World of Greyhawk,  what else is on that
planet besides the continent described in the official boxed sets?  And,
for that matter,  has anyone thought of allowing Birthright into
Spelljammer?  What would its sphere be like?  Would blooded PCs still exist
in space?  Official TSR types answers are very welcome, especially on the
Birthright question.

"We look on the same stars,  the sky is common,  the same world surrounds
us.  What difference does it make by what pains each seeks the truth?  We
can not attain to so great a secret by one road..."
Symmachus,  "Memorial on the Occasion of the Removal of the Altar of
Victory from the Senate House" (392 AD)

westermeyer.3@???.edu
Paul William Westermeyer