If you are following and contributing to Waves, you’re going to want to know when replies are posted. If you are the type to reply to new messages ASAP, you may want to check out these two desktop options.

Wander on over to That Smith and snag the Google Wave Add-on for Firefox. In true Wave adoption fashion, Chad is using the service to announce updates or provide feedback for the browser extension – Google Wave Add-on Wave (Wave account required). The extension brings the same convenient functionality to any OS assuming Firefox is installed.

For those who prefer the SSB or single site browser route, check out Devthought where you can find a step-by-step getting Wave setup with Fluid. Devthought includes a convenient userscript which appends the Dock icon with an unread badge icon whenever new activity is detected.