WiFi in the house
It was time to change away from the old WiFi router that I set up centrally-located in the house to a more enterprise-y solution. I found some used 2.4Ghz ubiquity WiFi transceivers for cheap on Craigslist that were previously used in an elementary school. It took me a weekend to get it all set up and well disguised in our house. Three transceivers covers every inch of our house with a very acceptable WiFi signal.