http://msmvps.com/blogs/theproblemsolver/archive/2008/05/20/runtime-modification-of-workflow-s.aspxModifying already executing workflow's is a very powerful option. Now, as with most advanced options, not something you are going to need every day but certainly something to be aware of and use when the needed. First lets take a quick look at whyenCommunityServer 2008.5 SP2 (Build: 40407.4157)