I've attempted to install on Ubuntu 7.04 AMD64 and I can't seem to get anything to build.
Here is what i type into the Bash prompt and the subsequent output from g++:
$ g++ -o test test.o -lsfml-system
/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-gnu/4.1.2/../../../../lib64/libsfml-system.so when searching for -lsfml-system
/usr/bin/ld: skipping incompatible /usr/lib/../lib64/libsfml-system.so when searching for -lsfml-system
/usr/bin/ld: skipping incompatible /usr/bin/../lib/libsfml-system.so when searching for -lsfml-system
/usr/bin/ld: skipping incompatible /usr/lib64/libsfml-system.so when searching for -lsfml-system
/usr/bin/ld: skipping incompatible /usr/lib/libsfml-system.so when searching for -lsfml-system
/usr/bin/ld: cannot find -lsfml-system
collect2: ld returned 1 exit status
I also tried out with CodeBlocks but it kept telling me that the calls to functions were undefined yet I setup as the instructions said and copied and pasted the Clock.cpp code from the tutorial on the main website.
Edit: my temporary workaround has been to switch to 32-bit Ubuntu, would be nice to see a future release that supports 64-bit Linux, but its still a fantastic start.