/plugins/DefaultPage.cs
using System;
using System.Text.RegularExpressions;
using bytex64.WebThing;

public class DefaultPage : WebThingPlugin {
    public override void Init(WebThing wt) {
        if (Config.Arguments.Length > 0) {
            foreach (string arg in Config.Arguments)
                wt.OpenTab(arg);
        } else if (Config.Options.ContainsKey("DefaultPage")) {
            string[] pages = Regex.Split(Config.Options["DefaultPage"], @"\s+");
            foreach (string page in pages)
                wt.OpenTab(page);
        }
    }
}