And bingo, Politico claims to have found some on the new White House website. Scoop!
Politico discovered that on "The Agenda" page, which listed 24 policy topics (i.e. defense, disabilities, health care, etc.), there was a subset of "Additional Issues," and within that subcategory was an entry for the topic of "Katrina," and buried under that heading came these two passing sentences:
President Obama swiftly responded to Hurricane Katrina. Citing the Bush Administration's "unconscionable ineptitude" in responding to Hurricane Katrina, then-Senator Obama introduced legislation requiring disaster planners to take into account the specific needs of low-income hurricane victims.
The Politico headline? "New White House site slams Bush," of course. [Emphasis added]