oy, I have to check out the game resources with the game source. This makes for a loooooong checkout when all I'm interested in is compiling the game. Here is my suggestion:
Make the folders in trunk/base empty (placeholders, for next step)
create a shell script that will 'svn switch' the game resources into the empty directories. Something like trunk/base/getresources
a 'complete' checkout process would then be:
svn co
https://ufoai.svn.sourceforge.net/svnroot/ufoai/ufoai/trunk ufoai
cd ufoai/base
./getresources
Pros:
Shorter checkout time for coders
'svn update' will still get the latest resources that have been switched
can use branch/tag/trunk structure for resources, ie:artists can submit their work to an unstable branch that would not be included in a stable release distribution
Cons:
two extra steps for a complete subversion checkout