Just in time for the iPhone launch later on today in the US, Apple have just released iTunes 7.3. The main update does seem to be for the iPhone, but with Apple, there may be some bug fixes too.
The download is 33.8mb for the Mac version and 47.4mb for the Windows version.
Source: Apple iTunes
Update: I’ve update to iTunes 7.3, and part from having to accept the license agreement, and updating my library, the only difference I can see is the new iPhone option.