Last weeks update included the following changes:
The /download page is now called /basket since the name download became more and more confusing due to the added functionality of the last weeks. You can think of it as a basket where you can collect BibTeX entries in a persistant manner, download or edit them. For sure we will add more functionality in the future.
Joining existing groups is now much easier: there is a link for each group which allows users to inform the admin of a group that they want to join it.
We added a check for commas in tags since some people tried to use them as separators instead of space.
And last but not least we want to thank the Universitäts und Stadtbibliothek Köln for adding a link to BibSonomy to there Kölner UniversitätsGesamtkatalog which allows to add books from the catalogue to BibSonomy with just one click. Great!