Great program. I awoke this morning with the sprinklers running with your program doing the work. The interface is good but I would like to make a few suggestions.
A status page would be useful that shows the next schedule to run and when it is set to start. It might also include an indication of what zones will run and the time for each. Also some display that shows the status of the weather underground link would be helpful. As it stands I have no way of knowing whether it is configured correctly or not. The status display could also show when a schedule is delayed due to weather. This should be the first page seen when accessing the website.
Also, where is zone 0? The interface board supports 8 zones but I only see 7 on your interface. (Is it for a pump control?)