WP-Cumulus displays your tags and/or categories in 3D by placing them on a rotating sphere.
The options page allows you to change the Flash movie's dimensions, change the text color as well as the background.
The movie will scale itself to fit inside whatever dimensions you decide to give it. If you make it really small, chances are people will not be able to read less-used tags that are further away. Anything up from 300 will work fine in most cases.
Ideally, the height should be something like 3/4 of the width. This will make the rotating cloud fit nicely, while the extra width allows for the tags to be displayed without cropping. Western text is horizontal by nature, which is why the ideal aspect is slightly landscape even though the cloud is circular.
Type the hexadecimal color value you'd like to use for the tags, but not the '#' that usually precedes those in HTML. Black (000000) will obviously work well with light backgrounds, white (ffffff) is recommended for use on dark backgrounds. Optionally, you can use the second input box to specify a different color. When two colors are available, each tag's color will be from a gradient between the two. This allows you to create a multi-colored tag cloud. The third input box lets you specify a mouseover highlight color.
The hex value for the background color you'd like to use. This options has no effect when 'Use transparent mode' is selected.
Turn on/off background transparency. Enabling this might cause issues with some (mostly older) browsers.
Allows you to change the speed of the sphere. Options between 25 and 500 work best.
When enabled, the movie will attempt to distribute the tags evenly over the surface of the sphere.
Choose whether to show tags only, categories only, or both mixed together. Choosing 'both' can result in 'duplicate tags' if you have categories and tags with the same name. These words will appear twice, with one linking to the tag and the other to the category overview.
This setting allows you to pass parameters to the wp_tag_cloud function, which is used to fetch the tag cloud. Use caution with this setting. Everything you enter will be passed to the function. Be sure to read the function's manual. Please also note that these parameters affect tags only. If you've chosen to show categories or both, the category 'tags' will not be affected.