I’ve actually been using this for the past year or so. I saw it featured on HN this morning, so wanted to share:
Solaar is a Linux manager for Logitech keyboards, mice and other devices that connect to a Unifying, Bolt, Lightspeed or Nano receiver as well as many Logitech devices that connect via USB or Bluetooth. Solaar is not a device driver and only responds to special messages from devices that are otherwise ignored by the Linux input system.
I was about to get rid of the USB wireless dongle that came with my Logitech mouse and now once I boot or open lid it connects perfectly without delay after adding it to Solaar.