Snow Leopard extends Wake-on-LAN feature... if your config is right

I have experienced more or less the same issue than cdogg : when the "wake on demand" option is checked, and I put my iMac to sleep, few hours later it wakes up with ODD fan running at full speed. In this case I have to force sleep again for stop fan.

I got a little nuts and put a new 2009 MacPro's Airport card into a late 2007 mini - this was mainly to up the speed to 802.11n, but this feature is something I'm really interested in using as well.
Problems arose however. The new airport card works fine in the order Core 2 Duo Mini, and if I look in the System Profiler, it lists the new card as supporting Wake on Wireless. I flipped "Wake for network access" on via the Energy Saver settings, and yep, sure enough... it does broadcast the services of the mini while it's asleep. iTunes and the Mini via the Finder both show up.
It gets weird if I try to actually use them however. Basically, it won't work, and I'm having trouble nailing down the reason. It sits there looking for the services on the machine for a while and eventually times out. Meanwhile, obviously, the mini hasn't woken up on the other end.
I'm hoping there's not some hardware compatibility necessary beyond the Airport card itself, but as of yet, that's all I can really assume is the issue: that Apple's not listed some other necessary component to enable this.
In any event the Airport Extreme's "magic packet" is either not sending at all, or there's something in the older mini that won't interpret it maybe? I don't know.
Figured I'd toss it out there in case someone else has any ideas.

Not sure if anyone's noticed this if you have this feature enabled you can now wake your Mac by opening the iPhone Remote app. Handy if you have your Mac hooked up for media playback, or if you want wake your computer to use a VNC client etc. :)

There is also online Wake-On-LAN that can also be used with Mac. It is available at http://www.wakeonlan.me

"It's been a stealth feature of modern Macs for years: the ability of a sleeping machine to respond to a 'magic packet' delivered over Ethernet and wake up on command"

This has also been a feature of PCs for years, in addition to Wake-on-Wireless; I only say this because your decision to say "modern Macs" versus "modern computers" can be interpreted to imply that PCs don't do this.

This is a huge feature!! I can only imagine how many machines are running day and night because of unreliable sleep/wake-up or because they want remote access to their stuff. Back-to-my-mac finally becomes a viable option now.

This will save a lot of energy if it works reliable and can be trusted!

Works fine on mid 2007 iMac as well

I’ve only seen 2009 — and now 2008 — models mentioned, but my late-2007 iMac works too. Not a mid-2006 MacBook though.

Is there a feature called Wake-When-I-Plug-In-A-MacBook-Even-Though-It's-Closed? Better yet, is there a way to turn that off? I'm trying to prevent a MBP from waking every time I want to charge the battery.

I can't get my unibody macbook to keep broadcasting my itunes library. I have a Time Capsule... is there a setting I need to change?

This article makes it seem like it's automatic, but I've yet to see this be the case. Any help here folks?

Thanks!