The Planetary Society released its own statement following President Obama's speech at NASA, stating:The Planetary Society's leadership believes this new plan will take humans beyond Earth orbit to interplanetary space sooner than was possible under the old program, and it will take us farther and to more destinations than was ever planned with the Constellation program.
We commit our energy and resources to help turn this NASA plan from words to reality. Congress must now act upon the President's proposal. We recognize that it will be a long, hard fight, that there are entrenched interests that must be overcome, that business-as-usual must be surmounted, and, and that it will require breaking through technological barriers. But if human space explorers are to reach their destination of Mars within the next few decades -- a cherished dream of Society Members -- this is the only realistic way to get there.
Go here for the full statement.