Some of you know that i've been tweaking the heck out of a old tray-load iMac. To jump you all up to speed here are some things I have done.

ATX power supply mod.
Slot-load 4x DVD drive.
maxed out the memory to 256MB.
Overclocked the CPU from 233MHz to 300MHz.

From all of the tweaking I killed the slot-load DVD. I have though found a compatable 8x DVD tryload from a old Techra laptop. Also added a 2.5 20GB harddrive.
Sadly it's still caseless but soon I will build a case for it. Theres still a lot of work to be done on this little project. I might just make this iMac a File-Server or a HTTPD / SMTP,POP3 server for my Counter-Strike clan.

I want to ditch 10.1.5 and move onto a new version of OS X but then i'll lose system resources. I may switch to BSD or some sort of Linux Distro. Heck darwin 7 might do the job since it's going to be a server, just need SSH access to run it.

Anyway as for the case I was thinking to take a old desktop case and cut it up for this project. Soon i'm going to get a weilder for my garage for car stuff but it would come in handy for building custom computer cases.

u.... i like your motive but i don't think your brains have been able to catch up just yet, my old imac g3 dv edition was a beast compared to that i and all i did was put a bigger hard drivee in her. and no matter what you do all it will be is a g3 imac at 300 mhz and 256 of ram. then you want to make it a file server how much storage are you ganna get out of it? i don't think that board was made to handle a bunch of drives nor does it have firewire and i wouldn't be surprised if it still has usb 1. and lastly if you had the money to buy the drives you would have the money to buy a half way decent machine or if you had the drives  you could sell them to buy a good starting point for your project. im not trying to discourage you in any way but allways remember to think big and don't underestamate yourself.  :compute:

That iMac, being a Rev A should be able to hold 384MB RAM and an internal 128GB HD with no problems.
The types of RAM and HD you need for that iMac are pretty cheap nowadays.

Something you might keep an eye out for is an iRack from Marathon Computer. Its a 1-U rack case for tray loading imacs. they also made one for the slot loads. Super awesome, and pretty damned rare. I'd been lusting after one for several years till one of my best friends gave me his before moving to vegas. SO COOL!!!  >:D

I have a killer idea for this iMac.

I'm planing on planing to buy a 2001 Dodge Intrepid. The one that i've had my eye on has no CD-Player due to a breakin and the owner hasn't replaced the radio. Well I was thinking to install the iMac into the trunk or glove box and use a Playstation one LCD screen in the center console and buy one of thoses keep wannabe touch screen adators.
Load the HD with OS9 since the iMac is only 233MHz and has 256MB of ram and use it as a MP3 player. I have a extra amp to power the speakers too. If I install the iMac into the glove box I can also route the DVD drive to the center console cluster so I can play msuic CDs and let people I drive around watch DVDs. Maybe even add a extra LCD for the back of the car (overhead) or on the back of the center arm rest.

For thoses of you that don't know what I mean by turning the LCD into a touch screen is to use the NAVIsis EZ-Canvas. It adds sensors to the screen and you can use a pen or finger.

Woohoo, I got a PS1 LCD today and spent about 3 hours on wiring it up and it works great! I gave it about 15feet of cable so it should be long enough for when I get my car. Tomorrow im going to go buy a cheapy CD Player dash kit and mold it for the LCD.