I really really miss a proper XML sitemap.
Since wbb 4 there is no proper bug-free package that allows you to create this.
Having an xml sitemap is important for google.
It allows you to ping google when new content is available, speeding up indexation dramatically.
I've tested it and new threads where indexed by google in 15 minutes on wbb 3 (with seo plugin).
Since wbb 4 it takes 1 to 2 days