A quick update to my post from yesterday - the name of the upcoming Pentax mirrorless camera will be Q-S1 (and not Q2 as previously reported). Attached are few more leaked images courtesy of digicame-info.
Reminder: the Pentax Q10 camera with 27.5-83mm lens is on sale for $169 for the next few hours (regular $399).
Update: the Pentax Q-S1 will have 1/1.7" sensor and will be available in many different color combinations: