This week's test day is on Crash Catcher, a new feature which will allow you to submit automatic bug reports when packaged applications crash in Fedora 11. If people could come along to help with the testing, that would be awesome. This is a new feature that will be showing up in Fedora 11 and will be very visible, so if you want to make sure it's not going to annoy the hell out of you, come to the test day and tell the developers how it should work! Test days take place in the #fedora-qa IRC channel on the Freenode network - see How to use IRC if you don't know how to use IRC yet. This one will run from 12:00 to 20:00 UTC (7am -> 3pm ET).
There's a Wiki page for the test day, which explains all this information, plus how to test that the system is working as expected. If you have any questions about anything, let me know.