The Zmanim API currently has 2 sample classes in the output package (no longer available). One the ZmanimXLSGenerator outputs zmanim as an Excel spreadsheet and is currently used in the Zmanim Calendar Generator, the other that is not fully maintained outputs zmanim in a PDF format (no longer available). I just started work on the third output class. This will generate an RSS feed of zmanim for a given location. I plan on outputting zmanim for the current day and the following week. The API that will be used is ROME. It seems pretty stable and relatively easy to use.
As pointed out in a comment on the WordPress Hebrew Date Plugin page, there was a PHP function isJewishLeapYear missing from the plugin that caused issues when the month was Adar. I added this to the file and relesed it as version 0.9. I do not have any posts in Adar, so I can’t really test this fix, so please let me know if you run into any problems.
Provide links to locate longitude and latitude information
Add support for the generation of a standard (not full as is the default now) calendar with a much smaller set of zmanim
Implement the generation of PDF calendars
Possibly use the Google MapsAPI to allow the selection of longitude and latitude information
The code for the PDF generation is already in the API but has not been updated in a while and does not work properly. This will also have to be updated for the standard calendar mentioned above. The way I envision interacting with Google Maps would be to allow the user to center their location in the map, and have those coordinates used for the zmanim calendar. This would have been relatively trivial if they provided geocoding information, by just allowing the user to enter their location as it can be done at Google Maps, but they currently do not provide geocoding information. I haven’t touched their API yet, and although it does not look too complex, it will probably take a while.
Do a Google search for "javadoc api" and amazingly the API Docs page shows up at number 9 (number 10 if you omit the quotes). I somehow doubt that the tweaks last week had this effect. I guess not too many pages have these words in the URL, title and page content. It’s still nice to be in the same list as Sun. Interestingly Sun did not end up in the first place. I found this via the log files when I noticed a referer (not a typo) of the Google search for javadoc api.