Hi, I use Animation stand. It is used by the big studios and was developed on the mac but eventually got ported to all the OS versions ( windows, I believe linux too ). I use the windows version 'cos I have windows 3D programmes and I couldn't afford two systems for different programes. The website is www.animationstand.com . They have a fully functional Lite version you can download for free. The full Pro version costs about $600. Another option would be ToonBoom. It is a new Lite version of USanimation Software used by the big studios ( USanimation was used for the rugrat movies ). You can check it out at www.toonboom.com. They have a demo you can download too but I think it's geared more towards web animation. However, reviews I've read state that it could also export quicktime movies. The full version costs about $380. Adobe After Affects is another industrial standard software you might want to check out at www.adobe.com. The standard version goes for about $650. The production bundle with extra filters, bell and whistels, etc costs more. After Effects is used for everything ranging from TV motion graphics, South Pack and even the pilot Blue's Clues series. Infact the latest Version 5 has very high reviews. I'm sorry I particularly don't know much about the Etchelon software you wrote about, but I think I identify with your dillema on 2D cel software ( especially on the mac ). I've lived with it for years :-) !!!! 2D animation is my first love, but unfortunately the digital tools are still beyond reach for the average independent film maker with RETAS at almost $5,000, ANIMO at $15,000, TOONZ at $15,000, CTP at almost $3,000. It's indeed absurd. Especially judging by the fact that all the software really does is to simply move YOUR DRAWINGS. Anyway, maintain your high spirit. Good luck and happy animating !!!!! :-) !!!