This list of Echolink commands should be helpful if you want to do more than listen to a repeater. Note that repeater operators can and will change any of these codes.
To switch a Baofeng UV-5R between high power (5 watts) and low power (1 watt), press the octothorpe key ("#") briefly. The "L" character will light on the display if you are operating low power. A long press of the octothorpe key will lock the keyboard or unlock it.
The current version of Chirp is 0.4.0. I updated my radio so now it has channels 1-70 with a bunch of gaps, and added Monroe County, Lucas County (Ohio), and Marquette County repeaters to my setup. Alas, the programming I did managed to get the receive frequencies correct but did not properly get the repeater offsets. I don't know exactly what happened, next time I'll go back and sort it out.
We went to a Mud Hens game (it was a good time, and they won). I wasn't able to find the Lucas County, Ohio Skywarn repeater. We had a little light rain in the first two innings but it cleared up and was a beautiful night.