extisp.icio.us text gives you a random textual scattering of a user's tags, sized according to the number of times that they've used each of them, and leaves you to draw your own insights from the overlapping entrails.
Using the transcripts of Bill Gates' keynote from CES 2007 and Steve Jobs' keynote at Macworld 2007 (via Todd Bishop's Microsoft Blog) I created this relational tagcloud using Rhizome Navigation.