At 3:30 pm Pacific Time he will be doing a chat at guitar.com.
Here's some info from Linda:

On the home page there is a place to click on SLASH. If you just go to their chat sites, that's the wrong place. You really want to go to Yahoo's celebrity chat sites. Probably because they have software that allows for moderation. You have to be registered there to get in the rooms.

And as you might remember, Slash will be on Soundbreak later that same day (At 6:30 pm Pacific Time). You need to register there as well.