Hello, I'm bringing up this old topic again after collecting and sumarizing
all the responses plus adding in some info from other posts on other
topics.  I've posted the final compiled list below, as it stands to the
best of my knowledge.  If anyone can please correct/update my list, or
perhaps add to my list any notable ensembles or conductors I may have
missed, I would very much appreciate it.

BBC NO of Wales - Hickox
BBC Philharmonic - Yan Pascal Tortelier
BBC Scottish - Osmo Vanska
BBC SO - Slatkin
Berlin PO - Abbado, to be succeeded by Rattle
Boston SO - Ozawa
Bournemouth Symphony - Yakov Kreizburg
Chicago SO - Barenboim
City of Birmingham SO - Oramo
Cleveland - Dohnanyi, to be succeeded by Welser-Most
Dutch Radio Philharmonic Orchestra - Edo de Waart
Halle Orchestra - Elder
LAPO = Salonen
La Scala Opera Milan- Muti
London Philharmonic - Masur
London SO - Davis
Met Opera - Levine
Montreal Symphony - Dutoit
Netherlands Philharmonic Orchestra - Hartmut Haenchen
NYPO - Masur
Philadelphia SO - Sawallisch, to be succeeded by
Eschenbach
Philharmonia - Dohnanyi
Residentie Orchestra The Hague - Jaap van Zweden
Rotterdam Philharmonic Orchestra - Valeri Gergiev
Royal Concertgebouw of Amsterdam - Chailly
Royal Liverpool Philharmonic - Gerard Schwarz (soon)
Royal Philharmonic - Daniele Gatti
Royal Opera House Covent Garden - Haitink, to be
succeeded by Pappano
San Francisco SO - Tilson-Thomas
Staatskapelle Dresden - Sinopoli
Washington DC NSO - Slatkin

Albie