He was online posting on the 29th. Said he was leaving out for goodguys. He was then on the site (or someone was on his account) active on the 31st. It has only been 4 days. I am not trying to put anyone down for worrying, as I do the same all the time
I would just give it a day or two, folks get busy, summer is here etc.
If someone is friends with cal and feels comfy calling him, then by all means please do and update here. Lets hope all is well and he just got busy