Urban planning is falling into obsolescence, according to this piece, but employing old bottom-up techniques that value input from a variety of sources will make it relevant again.
"The lack of sufficient time to plan brings with it an atmosphere of higher risk. If planning is to remain relevant - economically, environmentally, socially, and politically - amidst the instability of the future, it must to be rethought in a manner that assumes risk and does not avoid it. Instead of simplistically putting all its eggs into a future based on past and present trends, urban planning must provide sufficient looseness within future scenarios while attempting to tilt the odds in favor of certain directions.
Cities must be strategized not just in terms of how they are intended to work currently, but also how else they might work under extremely different (unforeseen and inconceivable) circumstances. As such, similar to well-designed software, urban plans must posses a variety of alternative organizational patterns as opposed to not the standard one.
Furthermore, urban planning must balance top-down and bottom-up thinking as a means of creating a variety of plans of equal value. This will necessarily be multi-disciplinary. However, the versatility created - like diversified stock portfolios - will allow a given design strategy to spread the risk and decrease its susceptibility to failure or obsolescence due to change in conditions. Additionally, it will recognize the emergent intelligence of its citizens to give appropriate physical form to the pressures being placed on them - to be refined, not created, by 'higher-level' professionals."
FULL STORY: The future of urban planning is open source

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Urban Design for Planners 1: Software Tools
This six-course series explores essential urban design concepts using open source software and equips planners with the tools they need to participate fully in the urban design process.
Planning for Universal Design
Learn the tools for implementing Universal Design in planning regulations.
Economic & Planning Systems, Inc.
UCLA Lewis Center for Regional Policy Studies
Mpact (formerly Rail~Volution)
Chaddick Institute at DePaul University
City of Piedmont, CA
Great Falls Development Authority, Inc.
HUDs Office of Policy Development and Research