New (Frankfurt-Accra-Libreville):

LH 566 FRA-ACC-LBV
LH 567 LBV-ACC-FRA

At least per Wiki, SQ is ending BKK-NRT on Aug. 1. @:-)

Just a minor update in the #1 post. LX does no longer fly to SCL. LX96's final destination is now GRU, hence the GRU-SCL has been axed.

I believe that these flights are only seasonal, when YYZ-ICN doesn't run non-stop.

AC063 YYZ-YVR-ICN
Ac064 ICN-YVR-YYZ

Also:
BD997 LHR-BEY-KRT
BD996 KRT-BEY-LHR

LH 562 FRA-SSG-ABV
LH 563 ABV-SSG-FRA

appears to (now?) fly FRA-ABV-SSG vv.
Flight numbers are the same. Checked for March 2010.

Tg507 bkk-khi-mct
tg508 mct-khi-bkk

ca945 pek-ctu-khi
ca946 khi-ctu-pek

I guess this list has fallen into disrepair, as there is no mention of CO at all since they joined Star.

CO1 IAH-HNL-GUM
CO2 GUM-HNL-IAH

CO4 MSY-IAH-LHR
CO5 LHR-IAH-MSY

CO6 SAT-IAH-NRT-GUM
CO7 GUM-NRT-IAH-SAT

CO8 NRT-EWR-BOS
CO9 BOS-EWR-NRT

CO16 LAX-EWR-GLA
CO17 GLA-EWR-LAX

CO32 MSY-IAH-CDG
CO33 CDG-IAH-MSY

CO34 AUS-IAH-LHR
CO35 LHR-IAH-AUS

CO36 MCO-EWR-EDI
CO37 EDI-EWR-MCO

CO38 IAH-EWR-OSL
CO39 OSL-EWR-IAH

CO44 MIA-EWR-MXP
CO45 MXP-EWR-MIA

CO46 LAX-IAH-FRA
CO47 FRA-IAH-LAX

CO50 CLE-EWR-FRA
C051 FRA-EWR-CLE

CO52 EZE-IAH-LAX
CO53 LAX-IAH-EZE

CO56 MCO-EWR-CDG
CO57 CDG-EWR-MCO

CO60 IAH-EWR-BRU
CO61 BRU-EWR-IAH

CO62 IAH-EWR-MAD
CO63 MAD-EWR-IAH

CO86 PVG-EWR-CLE
CO87 CLE-EWR-PVG

CO88 PEK-EWR-IAH
CO89 IAH-EWR-PEK

CO90 LAX-EWR-TLV
CO91 TLV-EWR-LAX

CO106 IAH-EWR-MUC
CO107 MUC-EWR-IAH

CO110 CLE-EWR-LHR
CO111 LHR-EWR-CLE

CO128 GIG-IAH-MSY
CO129 MSY-IAH-GIG

CO559 DCA-IAH-SNA (no corresponding return)

These are the ones I've found so far. Apologies if I've goofed on any.

SQ ended service to YVR in April 2009 so SQ17 (YVR-ICN-SIN) and SQ18 (SIN-ICN-YVR) are no longer valid.

someone willing to update this or tell me where to find flights like this?

with the UA merger i am sure there are many flights no longer are multi-sector

Maybe a bit cumbersome, but they are all listed here: http://www.startimetable.com/StarAlliance.pdf