The ACLU, GLAD, Lambda, NCLR, the Equality Federation, Freedom to Marry, GLAAD, HRC and NGLTF are not happy about the Olson lawsuit:
In response to the California Supreme Court decision allowing Prop 8 to stand, four LGBT legal organizations and five other leading national LGBT groups are reminding the LGBT community that ill-timed lawsuits could set the fight for marriage back. The groups released a new publication, “Why the ballot box and not the courts should be the next step on marriage in California.” This publication discourages people from bringing premature lawsuits based on the federal Constitution because, without more groundwork, the U.S. Supreme Court likely is not yet ready to rule that same-sex couples cannot be barred from marriage. The groups also revised “Make Change, Not Lawsuits,” which was released after the California Supreme Court decision ending the ban on marriage for same-sex couples in California. This publication encourages couples who have legally married to ask friends, neighbors and institutions to honor their marriages, but discourages people from bringing lawsuits.
More info on the suit here. The complaint can be read here (pdf).