Hey Cadburycircle,

Unfortunately there is no true version of Firefox for IOS devices. They do have a very slick app called Firefox Home that is available in the iTunes store. It works similar to Firefox Sync and allows you to see all the open tabs and bookmarks on your computer. You should take a look at What is Firefox Home for iOS (iPhone and iPad)? for more information.

Hopefully this helps!

The mobile Firefox is only for Android 2.1+ and ARMv7 types of cpu's. The desktop version for Mac OSX will most certainly not work on the iPad if that is what you were trying to do.

https://wiki.mozilla.org/Mobile/Platforms

iPhone/iPad/iPod
   We have no plans to release the full Firefox browser for iOS. The iOS SDK agreement requires apps to use Apple's own JavaScript engine (or none at all, like Opera Mini which downloads pre-rendered pages from Opera's servers and cannot run JavaScript code in the client). Because of this, we have no supported way to distribute Firefox's rendering and JavaScript engine to iPhone users. 
   However, you can download Firefox Home for iPhone, an iOS app that uses Firefox Sync to deliver Firefox bookmarks, browsing history, and tabs to your iPhone or iPod Touch.

Any time frame on an iOS version so I can run Firefox on my iPad?

There is no "time frame", that just ain't gonna happen. See James's answer above your posting.