I am an AC3D registered user. If you'd like to show your model created with AC3D to the web, you can export the model to VRML2.0 wrl file extension.
I have a web site
http://www.3dwebpresentation.com which presents VRML content using java applet. Today, most Internet viewers can interact with your model in real time without additional browser plugin. You can add a link back to you by e-mail or URL. I use my spare time to maintain the web site, model hosting is free to AC3D users.
Happy AC3D
XREN