Ok thanks all. It would appear that from others experiences that he'll get back to me eventually.
I'll sit it out for a few more days... I don't want to keep bombarding him with emails. Like I said above, I've sent a few over the last 3/4 weeks and to not even get a courtesy reply is bad IMO. I'm sure his work is great, and I've seen comments which would suggest this. It doesn't take a minute, like mbnu54 says, to type an email or phone or text. He's got my email address and phone number...