In case you (still) own a Samsung NC10 netbook and suspend stopped working with Fedora 15 there is a pretty simple workaround:

Enable “EDB (Execute Disable Bit)” in the Advanced BIOS options which will enabled DEP and as a side-effect magically make your NC10 wakeup currently after suspend.

I personally also updated to the latest BIOS version but it is not sure if that is necessary. See the bug report for details.