This ruling makes in unconstitutional on due process and equal protection.
The california ruling said that the statutes were unconstitutional because homosexual marriage was a fundamental right.
I would think the two courts are making two different arguments. Of course, I would have thought the bit about being a fundamental right would have been strong enough, but it seems it wasn't (although this probably plays a role in the current appeal against prop 8? that voters can't so easily re-write rights, that the process is more complex and difficult to achieve?).
Reading the Iowa constitutional amendment process, it looks to be more difficult to actually amend than in California.
Any amendment or amendments to this constitution may be proposed in either house of the general assembly; and if the same shall be agreed to by a majority of the members elected to each of the two houses, such proposed amendment shall be entered on their journals, with the yeas and nays taken thereon, and referred to the legislature to be chosen at the next general election, and shall be published, as provided by law, for three months previous to the time of making such choice; and if, in the general assembly so next chosen as aforesaid, such proposed amendment or amendments shall be agreed to, by a majority of all the members elected to each house, then it shall be the duty of the general assembly to submit such proposed amendment or amendments to the people, in such manner, and at such time as the general assembly shall provide; and if the people shall approve and ratify such amendment or amendments, by a majority of the electors qualified to vote for members of the general assembly, voting thereon, such amendment or amendments shall become a part of the constitution of this state.
If I understand right, it has to be proposed and accepted in one legislative term, accepted again in the following term, and then is put to a vote before the people.
Doesn't mean it won't happen, but I don't see how this process can take any less than two years (they won't have a general assembly election until '10). And just where will we be in two years? Perhaps people will have seen that homosexual marriage doesn't actually destroy marriage, that it's not the end of the world, that it's actually not bad and is acceptable.
This is in contrast to California, where apparently all you need is enough people to sign your petition to put an amendment up for a vote in the upcoming election.