Here's a little tips to show only the top level conversations from the list of active conversations.

If we have theses conversations (with nested conversations (>)):

A1 > A2 > A3

B1 > B2

C1

With the conversationList component you will see every conversations.

A1

A2

A3

B1

B2

C1

With the new component below you will see only the root conversations:

A3

B2

C1

My customer prefered to see only the root conversation and not the entire active conversations

@Scope(ScopeType.PAGE)
@Name("rootConversationList")
@Intercept(NEVER)
public class RootConversationList implements Serializable {

   private List<ConversationEntry> conversationEntryList;
     
   @Create
   public void createConversationEntryList() {
      Map<String, ConversationEntry> map = Manager.instance().getConversationIdEntryMap();
      Set<ConversationEntry> orderedEntries = new TreeSet<ConversationEntry>();

      orderedEntries.addAll(map.values());

      // Accumulates nested conversations
      Set<String> nestedConversationEntrySet = new HashSet<String>();
      for (ConversationEntry entry : orderedEntries) {
         if (entry.isDisplayable() && !Seam.isSessionInvalid()) {
            boolean skip = true;

            for (String conversationId : entry.getConversationIdStack()) {
               // The first nested conversation is always itself so we skip this one
               if (!skip) {
                  nestedConversationEntrySet.add(conversationId);
               }

               skip = false;
            }
         }
      }

      this.conversationEntryList = new ArrayList<ConversationEntry>(map.size());
      for (ConversationEntry entry : orderedEntries) {
         if (entry.isDisplayable() && !nestedConversationEntrySet.contains(entry.getId()) && !Seam.isSessionInvalid()) {
            this.conversationEntryList.add(entry);
         }
      }
   }

   @Unwrap
   public List<ConversationEntry> getConversationEntryList() {
      return this.conversationEntryList;
   }
}