The last two months we have experienced part shortages on both the SpeakJet and TTS IC's we provide in our kits. We typically see these around Christmas time as apparently the manufacturer get overwhelmed between burning the chips and shopping(?)...
Anyway I apologize to everyone who has ordered a kit and received an email from us asking whether to hold or refund. We have a lag in our order system still, and sometimes the web site does not update quick enough to post "Out of Stock" messages before an order gets processed.