We've been working hard on Merrimack, the updater for ColdFusion MX 7, for a while and it is now available for download from Macromedia.com.
The updater has much goodness in it, including lots of bug fixes, an update to Axis 1.2.1 for web services, an updated Verity (patch level 22) and a full Mac OS X installer. Read the FAQ tech note and download the full kit from the CF downloads page. You can also find out detailed info from the release notes.
Also read "Welcome to Merrimack: An Even Better ColdFusion MX 7", a devnet article written by Damon Cooper about Merrimack.
It is free for all ColdFusion MX 7 customers, and really adds some good polish to what has proven to be an enourmously successful release.