WM5 Network Analyzer PowerToy
Description from the download page: Network Analyzer for Windows Mobile runs network utilities (e.g., ping and ipconfig) on a Windows Mobile powered device. Network Analyzer for Windows Mobile facilitates the troubleshooting of network connectivity issues.
Ever want to PWN, WOOT, or direct DOS attacks from your mobile? Or maybe you just want to iron out network connectivity bugs. Either way you should http://www.microsoft.com/downloads/details.aspx?FamilyID=081c6401-49d4-4506-a03b-c41bc76c2f51&DisplayLang=en check out this neat program.