Damion Schubert, aka Ubiq, has posted a Designer's Diary on the Shadowbane website.  The subject is the siege game and the development team's goals for improving it.  Ubiq discusses (among others) the following goals:

• Make it easier to rebuild after a lost war
• Make trebuchets and other siege weapons more important
• Reduce tree camping
• Make walls more effective

Read Ubiq's post here.