This reminds me of my idea about Google's missed opportunity in messaging. They had billions in a captive audience for gmail - all they had to do was figure a

This reminds me of my idea about Google's missed opportunity in messaging. They had billions in a captive audience for gmail - all they had to do was figure a way to make the Subject field in SMTP optional, and bam! they'd have a killer messaging app (probably circa 2008 when this page was written). For a short message you don't want to have to decide a subject, as well as write the message itself. Instead they've languished launching 4 dozen messaging apps.