Is there any way to limit the number of leaf nodes you will accept as an Ultrapeer? Since loading the beta I've suddenly started acting as an Ultrapeer and leafs node, if you'll pardon the pun, seem to be branching out all over.

On a different, but related, note, I noticed what I thought was a pretty cool feature in another client I tried -- passive searches. I believe the idea was that you would specify semi-permanent search criteria and the client would check all the results being passed through your node to see if any of them matched your criteria. You're dealing with the data anyway, might as well see if there's anything interesting in it, right? This feature doesn't make any sense for the leaf nodes in the Ultrapeer/leaf structure that's currently being advocated, but it might make a nice perk for those selfless clients who donate their compute time and bandwidth for the good of the network -- the Ultrapeers.