MisterBee,
My timeline has went like this:
April 4th First inquiring e-mail, got a reply from Bryce in 12 hours.
April 16th e-mail, and phone call, no reply to either.
April 23 phone call no answer.
April 24th e-mail reply from Bryce in the AM, to e-mail I sent on 16th
April 24th reached Bryce by phone in the PM, hashed out the deal, set the price, and he promised to charge my card, and send an invoice via e-mail. Said he was "3 weeks out" on the heads.
May 16th reached Bryce by phone on my second attempt. He explained he was overwhelmed with demand, and explained he was still probably "2 weeks out". I explained that I hadn't been charged, or received an invoice, so I was worried that we didn't really have a deal. He promised to "take care of that this afternoon".
June 6th The charge for the purchase price appeared on my credit card statement.

I have not had any correspondence with Bryce since then, I have still not received an invoice, or the heads. I have 3 cars to work on, and I have yet to assemble the short block the heads are destined for, so I haven't made any efforts to contact him in the last month, figuring my time is better spent on the stuff that is in front of me.

So, yeah, it's not just you, if that helps!