For some reason, sleep/resume has never been a problem for me with Mac OS X Leopard on the HP Mini 1000 and even after updating to 10.5.7 a couple of weeks back, it's still working great as always.
And then I discovered something that made me more in awe of the beauty and gorgeousness that is the MacBook Mini! I can go put the machine to sleep by pressing Fn + F1. Of course I can still just choose to close the lid and off to dreamland it'll go.
Another Fn + F1 will wake the Mini up :D
Pressing any key will wake the Mini up.
For hackintoshes, laptop hackintoshes more specifically, the Fn combo keys usually make one of the big problems in terms compatibility. For example, when I started off with iDeneb 10.5.5, installing the IntelGMA950 kexts would indeed put my screen on the right 1024 x 600 resolution but it would mean losing the ability to use the brightness controls (Fn + F3/F4) . So knowing that Fn + F1 sleep works is a comfort.