I second that ndchan, Leopard does not equal Boot Camp.
I am pushing it running Leopard on a PowerMac G4 733!

ColdFusion has an OS X install, so doing boot camp is not necessary. Same for Flex Builder.

Well, some macs will fetch you a good price on Craigslist. Depends on your Config. G4 Towers are not the strongest sellers but G4 and G5 iMacs and G5 towers still command a good price here in MD.

That say, I have a G4 iMac that I keep for making into a public machine in the house. I don't want people on my Mac Mini. Also, with an Airport Express, I can use the G4 iMac for sending tunes to the stereo when company comes over. That design STILL gets ooohs and aaahs from people.

Lastly, as a friend of Mac people, I keep old machines around in the basement as parts machines. I get a lot of love and free dinners/lunches when I can pull a power supply or optical drive out of thin air when someone is in desperate need. No, a Yosemite G3 is not a modern machine, but for web and word processing it is just fine. How many 10 year old PCs can still be a viable machine for day to day use?

I have a Yosemite G3, WELL upgraded that I could just not part with. I kept him tucked away in the basement. Good thing I did. A dear friend and his wife split and my friend ended up with very little as he moved out. He has been very grateful that in his darkest hour I was there to "loan" him a working computer. 2 years later with his life stabilized. he still uses it. I have since acquired 2 more Yosemite machine as parts units. I expect that my machine will be in service for a few more years. At least as long as the web accepts the version of Firefox on it.

That is probably the best use for an old machine. Helping someone in real need.

I have a G4 iBook that recently had the screen fail....most likely a broken connection or something. Everything else seemed to work fine. As I didn't want to spend a lot to have a new screen installed, I thought I would purchase an inexpensive 19 inch LCD monitor to hook it up to. I have had laptops for so long, the last external monitor I owned was an Apple 13 inch tube model ( I forget now what they called it)

With a cordless keyboard and mouse, it is now enjoying a second life as a desktop computer, and I am certainly enjoying the bigger, easier to see screen.

Believe it or not, I still have a fully functional Indego iMac G3 350Mhz! I recently purchased an X-Arcade dual controller, downloaded MacMAME, Stella and a bunch of ROMs and has turned it into a classic arcade machine.

I put it in the basement and have my family and old friends come by and relive our youth playing the old Street Fighter down to Pac-Man and Centipede!

If you can't part with your old machines and it still works but not good enough to do anything good with it, turn a retro machine into a retro machine and have fun!

Um... OS X Server v10.4? -- how in the world does that not rate when something as useless as a $1400 "font server" rates number one?!?

I mean, if you're planning to waste $1400 to serve a block of ten computers, then get OS X Server 10.4 and set up file sharing with a folder containing all of your fonts. That leaves you $900 to waste on actual fonts. Duh.

"Photoshop runs like crap with 700 fonts on a local machine (on a brand new 4gb loaded iMac) just imagine how crap it would be running 2,000 fonts from G4 running over ethernet or wifi, shudder to think!"
A font server/manager is used so as to make 700 fonts available, without actually having them all "loaded" at once. I can't imagine having 700 fonts actually activated at any one time, however I can tell you that the company I work for has well over 10,000 fonts installed via the font server (which is located in an office about 500 miles from the one I work in) and I notice no speed difference using the fonts on the server from the ones installed on my machine.