It is not obvious from their web site, but weblogs.us is using a single copy of Movable Type to host all weblogs in violation of MT's license. In their support forum, the hosting setup is made clear in a discussion about MT plugins:
"Since everyone is installed under one main MT installation plugins must be installed by JD on the server and they will effect everyone.
I don't know if it is accurate or up to date, but their list of members' weblogs currently lists 187 weblogs, and their blog setup queue shows another 640 weblogs awaiting setup (all of which would presumably run under the "one main MT installation").
The admins of weblog.us seem to be about as ignorant about MT's license as the people running mBlog.com. They are aware that the old MT 2.661 license allows for unlimited authors and weblogs, but appear to have missed this point:
"Prohibited uses include, without limitation,... hosting, or offering to host, the Software, on any basis;..." (From the MT 2.661 Personal, Non-Commercial Use License, which was in force if MT was downloaded prior to May, 2004.)
Their "service" is definitely lacking some frills:
P.S. We don't accept payment for installation or hosting, we don't have PHP, we don't allow FTP. We are working on an easy way for folks to manage their files. For most people the "Upload" feature of MT is getting them by for now.
The warning I offered to mBlog users applies equally to weblogs.us users:
I strongly recommend that bloggers stay away from weblogs.us. If you have a blog there, export your data (if you're able to) and go somewhere else while you still can. A short letter from Six Apart's attorneys to weblogs.us' hosting provider may be all it takes to turn out the lights on weblogs.us, potentially leaving weblogs.us' users stranded with no way to get a copy of their weblog data.
Now that I know what weblogs.us is, the only "support" I will be providing to its users is to tell them the weblogs.us service is a gross violation of MT's licenses. As far as I'm concerned, weblogs.us' users should not expect nor have any right to any support in the MT Forums.