Using the blog clound from phydeaux3 and limit labels by post count is a handy way to control the size of your blog cloud. The code and instructions for the label cloud are here:
Tweaking the var cloudMin= 1 to var cloudMin= 2
in the script will suppress any label from display in the cloud with less than 2 posts (i.e., an unused label will display an erroneous 1 post count, but possibly more, so this may not be an option); you can change some other things here, too. A very nifty tool. 😉 The only disadvantage to this approach is that it will knock out any legitimate labels with only 1 post, too.. However, if your tag cloud is huge, you may even want to just limit to an even higher number.
The settings in the Variables section will be where you make most of your adjustments. Here I’ll
explain what each setting does.
var cloudMin= 1;
This setting you can use to limit the number of labels shown (for example if you have a lot of labels). Leave the setting at 1 to show ALL labels. If you enter in a higher number, then only labels that have at least that number of entries will appear in the cloud.
var maxFontSize = 20;
var maxColor = [0,0,255];
var minFontSize = 10;
var minColor = [0,0,0];
var lcShowCount = false;
Check the blogger group @ google groups for more help.