It turns out that iWork for iCloud beta works on powerpc. This is in Safari on Leopard, with Leopard Webkit 536.26.8 installed as system default. I only tried it with Pages and Numbers, but I can report that it works as it should, with a couple of little problems: 1) The scrollbars are Mountain Lion style, i.e. they disappear when not in use. You'll need a mouse with a scrollwheel. 2) On the eMac in my signature it is S-L-O-W. To access iWork for iCloud beta, go to https://beta.icloud.com/ and sign in using the Apple ID associated with a Registered Apple Developer account (if you have ever downloaded XCode from Apple servers you should already have that).