As the Fez has a memory card slot, you could log send errors to that:
private void TimerCallback_SendSbcData(object stateInfo)
{
try
{
SbcData data = new SbcData();
this.network.Send(data);
}
catch (Exception ex)
{
MyLogToCardMethod(ex.ToString());
}
}
Mounting the card instructions are on the manufacturer site: