I prefer to use the cross-platform locations like /usr/local/lib/libwx_mac-2.6.dylib and ~/.codeblocks, 
Those are "unix" locations, in Windows you have them in 
C:\Program Files\CodeBlocks\wxmsw26u_gcc_cb.dll (usually) and 
%APPDATA%\codeblocks, 
in Mac I also like to have 
libraries in 
/usr/local/lib/ (because I use MacPorts), but for 
bundles (.app) it would be ugly to have them in 
/usr/local/bin and similar places.
but I can probably be talked into changing those to /Library/Frameworks/wxWidgets.framework 
It's also fine as currently, if the mac dylib is inside the bundle,
I still suggest /Developer/Applications/CodeBlocks.app as the location for the program. 
Yeah, it's more standard than 
/Applications in this case and 
/Developer/Applications is more well suited (Xcode is there),
however since C::B is distributed as a bundle, that's a users choice,
(that is, what used to be /usr/local/bin/codeblocks) 
I think that location can be fine if you build it from MacPorts, but /Developer/Applications is fine too,
Some of the wizards also needs to be redone to understand frameworks, such as the ones for OpenGL/GLUT and wxWidgets...
Yes, there's a lot of work to be done