It was great to meet some of the people behind Musicbrainz - a really nice bunch of guys. I have a much better understanding of what they are trying to achieve.
On a more technical level they have big plans for the database, the most important for Jaikoz is the concept of release packages. At the moment album are often released slighty differently in different countries - and sometimes there are multiple releases in the same country, each occurence of this generates a new release in Musicbrainz. But these releases are not tied together and there is no way to accurately distinguish between two versions of the same release and two completely different releases. As a user I normally want to see only one occurence of each release, and I want to see the one for the country I live in, Musicbrainz is going to introduce the concept of a Package to tie all the variation of one release together.