While it's very useful to see how many sites are connected and how many transfers are occurring (with rushmirc.dll), it would be greatly helpful to have additional insight into those transfers.
Specifically I need to know what sites are being transferred between (source / destination) and the file name / size of file being transferred. The time elapsed would be needed and estimated time remaining would be a plus but not necessary.
I hope this is something you can strongly consider, it's really the only feature missing for me that I've always needed -- it would make the client fully featured for me. This can be of use in many instances, most notably when doing a check on slow file transfers or hung transfers in order to clear the hang up.