Vendor Search: Weblogs and Threaded Discussion Forums Together

I'm looking for some help here folks. I'm looking for a vendor that integrates weblogs and threaded discussion forums into the same environment. This means that members would be able to log into an online community and start a weblog for their thoughts and/or start a new discussion with a group.

The preference is that this vendor also provides these on a hosted basis- meaning that the vendor owns the hardware and everything is browser-based.

Right now, Web Crossing is one that I know can handle this, but I'm hoping to find others too.

Any thoughts?