select distinct BQUALIFIER,BNAME,DNAME from sysibm.syspackdep where btype = 'V'
gives you all packages where the views are used.
Unfortunately the column lastused in syspackage is not yet maintained in db2 v9.
Unless you have SMF history of monitor trace 7 there is no info in db2 when a package was last used.
I can explain it to you, but i can not understand it for you.