DataDude
You will soon be able to utilize Visual Studio Team System for Database Professionals for DB2. See Gert’s blog here. I really like DataDude and hope this gives it some more exposure. However the biggest hurdle seems to be it’s distribution. It’s only available through Team System Suite, this is a huge frustration in trying to get people to even try it, let alone adopt it.
In other DataDude news you can get the VSTS 2008 Database Edition GDR June CTP here also Andy Leonard published "Mastering VS2008 Team System Database Edition, Vol 1: Creating and Deploying Database Projects" today, which you can get here.
Also just found this, it’s a Visio for SQL Server Add-In that was updated in March. Haven’t tried it yet, but interested in anyone else’s experience.

But does DataDude support F#? Against native SQL. That would flipping rule!