A consolidation of my posts from The BC&T Pronunciation Thread and The Star Wars Pronunciation Guide Thread along with other general comments about pronunciation in the Star Wars universe.

Preferred pronunciation of popular Star Wars terms.
Asajj Ventress - ah-SAAZJ
A'Sharad Hett - AA-shaa-raad
Borsk Fey'lya - BORSK FAE-lee-yaa
Caamasi - kaa-aa-MAH-see
Corran Horn - KORR-runn
Darth Caedus - KIE-duss (rhymes with "hide us")
dianoga - die-aa-NOE-gaa
Elegos A'kla - ELL-ehh-goes AA-klaa
eopie - ee-OE-pee
Executor - igg-ZEKK-yoo-tur
Honoghr - HONN-noe-gerr
Ilum - ILL-umm
Jabiim - jaa-BEEM
Jacen Solo - JAE-senn
Jorj Car'das - george CAR-dass
Joruus C'baoth - joe-ROOS suh-BAE-oth
Kir Kanos - KEER KAE-noes
krayt dragon - KRATE
Nar Shaddaa - NAR shah-DAA
Noghri - NOE-gree
Captain Pellaeon - PELL-lay-onn
Tycho Celchu - TIE-koe SELL-choo
Vergere - vur-ZJEER
Prince Xizor - SHEE-zor
Shi'ido - shee-EE-doe
Ssi-ruuk - SEE-rook
Trandoshan - TRANN-doe-shann
Twi'lek - TWYE-lekk (think "twilight")
Yevetha - yeh-VEE-thaa
ysalamiri - ee-saal-aa-MEE-ree
Ysanne Isard - ee-SAAN IE-sard
Yuuzhan Vong - YOO-zaan
Zonama Sekot - zoe-NAH-mah SEE-coat

Does the Holocron contain official pronunciations?
Yes. As the official pronunciations are determined, the information is entered into the Holocron. When possible, this information comes directly from the author, provided she/he has a preference. Some authors do not. Since the Holocron can't easily handle the special characters that are used in dictionary pronunciations, we spell them out using normal letters.

Why track official pronunciations? Even within the films, one character will pronounce something one way and another character will pronounce it differently (ie, HANN or HONN; LEE-ah or LAY-ah)
We use pronunciations for several reasons. First off, it gives us a guide when recording voice lines for video games and when recording audio books. Pronunciations are also important for Japanese translations which are dependent on how words sounds rather than how they are spelled.

Which books have a pronunciation guide?
Essential Guide to Alien Species
The New Essential Guide to Characters

Karen Traviss's Mando'a, as she is spoke.

Got a name you're just dying to know how to pronounce? Discuss this further in The BC&T Pronunciation Thread.