The ability to multi-select in a search, and do the following:
* Bulk tag
* Bulk relate
* Build a book of just these (not very important)
Or even just "Return a list of only these topics" and then you can operate on that list as usual.
Fixed in 20110810-1230
Select the new "Add To Temporary List" option from the quick menu. Topics are listed in the "Temporary Topic List" panel. Click the "View Temporary List" or "View Temporary List New Window" to work with a list of the selected topics.