Go there, please. Open an account, create a community, add a bunch of friends, etc. Hit every single option and features on the site that you know about.
That site is running on the new database backend we want to use, and we need to make sure it's bug-free before we put it live on the slave systems.
Please, please, please. If you do find a bug, post all of the details into a comment here. The sooner we feel safe with InnoDB the sooner we make it live and (hopefully) speed up the site a ton ;)
Update: By the way... Add "dormando" to your friends list if you create a user on there, I'll periodically post requests/updates. Comment on those posts if you do end up testing the requested features.