http://www.livejournal.com/support/faq/158.html - This mainly just references http://www.livejournal.com/download/ which is horribly out of date. This FAQ will be removed, and information will either be added to http://www.livejournal.com/support/faq/290.html along with updated information about mobile apps, or if there are more current apps out there than I am aware of, this can have its own FAQ. Other than Semagic, though, I'm not really aware of any up to date and still being used LiveJournal apps. If you know of any, please comment with any information you have about them! All references to the /download page should also be removed from other FAQs and anywhere else on the site links to it appear.
http://www.livejournal.com/support/faq/27.html - merge with
http://www.livejournal.com/support/faq/216.html into a single FAQ about troubleshooting app errors. New FAQ category should probably be Troubleshooting.
http://www.livejournal.com/support/faq/218.html - Re-write into a basic explanation of the various APIs / protocols that exist, but mostly just refer to http://www.livejournal.com/doc/server/ljp.csp.protocol.html and http://www.livejournal.com/doc/server/ljp.api.html. Should move to "Working with other sites" FAQ category.