Phex is a solid program -- cross-platform, stable, and works very well. Here's some features I'd really like to see added to Phex:

* Continuous search: when a search is performed, continue searching the network indefinetely until the search query box is closed manually. Xolox does this, and returns far more results than any other app out there.

* Partial file downloading: if a user has a partial file, portions of it can be downloaded by others who are downloading the file from multiple sources. Xolox also does this, and it really speeds up download times (and helps the network a lot).

* Better interface: the colors and buttons are great, but the columns are too cluttered, and some input boxes appear to be missing in resolutions under 1024x768 pixels. Use kilobytes instead of bytes when displaying file sizes and progress meters.