Our website, www.airlessspraycenter.com now has "live chat". When I am around the computer at the shop, store, office or house, I will monitor the site and if I’m not with a customer, up to my elbows in a machine, holding Ellie Rae, or otherwise indisposed, I will respond through the site. The "chat button" will let you know if I’m available.
The other way is our existing IM. I am airlessspraycenter on Yahoo Instant Messenger (firstname.lastname@example.org). And after 5 years, I’ve actually started using it.