Hi, just found a small bug in WPMU 1.0
For the import function from RSS feed, the imported post would always have author as "admin"
The simple fix would be to search for the following code in /wp-admin/import/rss.php
$post_author = 1;
$post_status = 'publish';
And replace with the fix:
$post_author = the_author_ID();
$post_status = 'publish';
Now it should work.
I also tried the remote RSS importer(link), which makes much more sense since normally nobody saves a RSS feed to a file.
Anyway, the above fix has to be applied to the remote rss importer to work as well.