Dear lazyweb,
I'm doing some research for a weekend KDE project, and you're all invited to help me 
Is there anything in KDE (or Qt4) that can read the Compound File Binary Format?
I'm also looking for code to borrow that can extract a file out of a CAB format file (I know about cabextract and its library version libmspack, but no-one packages libmspack, and I don't want to depend on a binary).
Suggestions welcome 

no-one packages libmspack
Possibly that's because no programme uses it. If the licencing is sane it's probably easy enough to package if something needs it.