For linux with gcc2 compilers :
http://uno-servlets.sourceforge.net/bin/udk3.0.1-gcc2.tar.gz
For linux with gcc3 compilers :
http://uno-servlets.sourceforge.net/bin/udk3.0.1-gcc3.tar.gz
( Note: The linux versions were built by myself with the OpenOffice 1.0.1 sourcetree. Reason are some problems with exception handling on linux, which can lead to crashes. Additionally I had to apply a patch for a crash, which occurs in case the proc file system cannot be read, according to the LGPL, I need to provide the patch file for the source, it can be downloaded from here.
These linux dev kits contain only the core idl-files, such are not a complete office development kit. However, this is sufficient for the UNO core. )