hwbrowser still uses some old icon: http://hg.fedorahosted.org/hg/hwbrowser/raw-file/1319dbf9dae9/hwbrowser.png I think our Design Team would love to create a new modern one. Do you want me to contact with them about it?
Hwbrowser is long obsolete -- it still uses kudzu for detecting hardware. I've just retired the package in pkgdb for Rawhide/devel and asked rel-eng to block the package. FYI, I plan to write a replacement sometime which uses udev instead of kudzu (which would allow detecting hardware when plugged in), and I would then need a suitable icon, but I don't have a timeframe for that yet.