According to TEPCO (and GE documentation) the containment vessel did in fact contain the core material. Looking at the measurements reported, (both from TEPCO and other agencies) there isn't an indication of either groundwater or watertable contamination.
[update: The TEPCO folks early on said they did see some groundwater contamination with Iodine. They also point out that the plant is 'downstream' of the water table with any nuclides most likely being carried to the ocean rather than to either of the rivers higher in the water table. The engineers will know more when they open things up and start cleaning them out.]
The 'news' is that cleanup will take longer because rather than pulling fuel pins out of the reactor and sending them off to be either re-processed or disposed, the core material at the bottom of the reactor will have to be removed piecemeal by what is probably custom equipment.
This was the same procedure used at TMI to remove material that had migrated to the bottom of the reactor after having melted.
I don't think anyone disputes that this was a tragic event and at seems nearly the worst possible accident (it could have been worse if all reactors were at full power) but it hasn't killed anyone yet, this incident is unlikely to be the principle cause of death for anyone in the forseeable future. And yet tens of thousands of people are dead because they couldn't flee the wall of water, so the tsunami was a disaster, the damage to the nuclear plant was not.
When you see a head-on collision and the person in the car walks away because the airbags went off, we don't argue for banning driving because the car is destroyed, there is $50,000 worth of damage to the guardrail, and hundreds of people lost work because they were caught in the traffic jam. We say, "Isn't it amazing how safe cars are these days! That accident would have killed them even 10 years ago."
We have had a head-on collision between a late model nuclear reactor and an incredibly and extremely unlikely large magnitude double disaster and so far, the safety systems that were built into the reactors and upgraded over the years have kept everyone safe. Slowly, steadily, and with good engineering practices.
The results of that disaster are being addressed and will be cleaned up and repaired. I realize that someone walking away unhurt from what would have been a fatal collision might feel that it was a miracle, but it might just have been good engineering.