Visualizing CiteULike collections

I am collecting my reading and reference material in CiteULike. I like the service because it can capture details from multiple sources. It also allows to discover what was collected by other interesting people through tags, people and bookmarks graph navigation. Nice as CiteULike is, it is fairly difficult to get an overall picture of one’s own collection. It is especially difficult to see quickly if there are people who serve as hubs by collaborating with multiple different groups.