The best replacement for usb port is usb hub.

The best alternatives to usb port are rated as following:
★★★★★  usb hub
★★★★  firewire port
★★★  hub
★★  serial port
★★  usb input
★★  firewire
★★  parallel port
★  cloudftp
★  unpowered
★  ethernet port
  com port
  usb port
  superspeed usb port
  micro usb port
  hdmi port

Your alternative for usb port is not listed? Suggest!
Speaking about usb port, one probably shouldn't forget about headphone jack.

Other search terms related to usb port and their ratings are:
★★★★★ headphone jack
★★★ audio
★★★ adapter
★★ fm radio
★ ipad
★ ac adapter
card reader
You have in mind a companion for usb port and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of usb port in all years. Click on graph for more.
usb port
usb hub
firewire port