I second this opinion. The last position a tech startup needs to worry about filling is a CEO, CMO, etc.

A CEO twittering all day long, hanging out / socializing / spending money at conferences and meetups is NOT going to bring ANY value to the startup at all.

You first need a product!

Once you have a product out of the door, a proven idea and a cash flow you can start worrying about filling up those hi-procrastination roles. Until then worry about finding people who can code, can design, can hack, can do anything that has a measurable outcome.