Fairly comprehensive Austin Bicycle Events Calendar, here:
http://bicycleaustin.info/events/#calendar

And links to full .pdf's of COA Bike Maps, here:
http://assets.austintexas.gov/coa-bi...blowup-web.pdf
http://assets.austintexas.gov/coa-bi...l-city-web.pdf

Print versions, highly recommended, are available at any local LBS. List, here:
In general:
South:
BikeAlot
ATX Bikes
Bicycle Sport Shop

East:
East Side Pedal Pushers
Longhorn Bikes

West:
Nelo's

North:
Ozone
Austin Bike Farm
Bicycle Sport Shop
Buck's Bikes

Downtown:
Mellow Johnny's

Link to BicycleAustin.info, here: Comprehensive List
http://bicycleaustin.info/eqp/shops.html