One of the most overlooked features in Chax is the ability to auto-accept Screen Share, specifically set to certain other users (like just yourself).

Where could this be handy? If you travel with a laptop and suddenly realize that you need a file from your home Mac, it's now easy. Just keep your home Mac on, and then from your hotel in Bombay or Sydney or wherever, Screen Share into your home Mac. You can copy files over to you, print stuff from your home printer (for your partner to fax out, etc). It's just a dang cool feature.