They will be collecting data on personal journals. You must opt OUT or you will automatically be opted in. To opt out:
As always, we are providing a way for any user to opt out of contributing to the stats-gathering (even though we know it runs the risk of statistically biasing our results). If you’d like to opt out, go to the Admin Console - http://www.livejournal.com/admin/console/ - and type "set opt_exclude_stats 1". This opt out applies to the entire implementation of Omniture -- site-schemed pages and the new inclusion of journals, profiles and communities. If you've already opted out, you don't need to do so again.