Small update: visiting individual posts (try clicking their titles if you never thought to do so) now shows an extra button that allows you to return to the appropriate page of the appropriate WebLog on which it appears!

The neat part is that it's hooked up to the part of the pipeline that splits the posts up into pages, so if you make sure you haven't had a tab with a post open for days and it's actually refreshed, it's always going to let you return to the correct page. Neat!