Here (5.5 MB pdf). Council likely will consider it in February.
Austin has 3,500 linear miles of absent sidewalk. City staff estimates it will cost $750 million to build out the network. Staff is floating the idea of a 2010 bond election, but the City obviously won't try to fund the entire build-out. Hence, the Master Plan will determine who gets sidewalks within the next few years.
The City's consultants developed a matrix to prioritize absent sidewalk segments. The matrix (pdf) assigns a score to each missing segment. 50% of the score is based on "pedestrian attractors" like proximity to employment, transit, government offices, area density and core transit corridors and area household income. 40% of the score is based on pedestrian safety factors like street classification (arterial streets get more weight than residential streets) and the number of pedestrian/automobile incidents in the vicinity. Finally, the matrix assigns some weight to the availability of developer money and neighborhood plan priorities.
Below are the matrix results for three parts of town. Expect the dark red and perhaps the dark blue segments to be built out within the next few years. I have no idea about the others; the schedule obviously will depend on the amount of bond funding.
First, south Austin (north of Ben White):
I do have a quibble with this. My neighborhood, SLNA, is essentially cut off from Oltorf because Thornton, the only connecting street, is inhospitable to pedestrians. It is a poor-visibility, heavily-traveled, fairly high-speed street, but parked cars force walkers into the middle of the street. The proposed scoring system ranks almost all of Bouldin Creek's sidewalks ahead of Thornton.
Oh well. I recognize that people will quibble no matter the scoring system.
Next, east Austin:
East Austin gets most of the high priority streets. No complaints here.
Finally, central north Austin:
Pull up the map on page 17 of the plan to check out your neighborhood.
By the way, the consultant is putting together a GIS viewer to view sidewalk conditions, routes, and so forth. It ought to be pretty cool.
Update: I've extracted the city's map from the packet.