In response to a request from brett, here's my chord chart for the rhythm guitar changes to As Long As I'm Singin. The song is in the key of Bb, and has a form of AABA with modifications, please note that I'm not sure about the B-section so it may be wrong.
Intro. (with horns)
A6-Bb6-G7/D-F7/C
Bb6-G7/D-Cm7-F7/C
repeat above bars once
Intro. Solo (over A section, play A section twice and on 2nd ending play dim7 chords leading to F7#9)
VERSES/SOLOS
A-section
Bb6-G7/D-F7/C
Bb6-F7/C-Gb7/Db-G7/D
Dm7/F-Dbm7/E-Cm7/Eb
Bb/D-G7/D-F7/C
(on 2nd A section after Cm7/Eb play an F7 and then Bb)
B-section
Fm7(or Fm9)-Bb13-Eb6/9-Bbm7-Eb13-Ab6/9-G7/D-C7-Dbdim7-Dm7-Ebdim7-Em7-F7-Cm7-F7/C
The rest of the song follows these progressions, and the mambo part is Bb-Ab-Bb.
Again feel free to post any comments or corrections, etc.