Little change, to the last paragraph.
You can visit http://www.livejournal.com/invite/ to generate your codes. Once you have generated a code, be sure to refresh the page (http://www.livejournal.com/invite/) so your code will appear. When you've generated a code, you can use it yourself or give it to someone else.
I don't like "... you have generated a code..." being in there twice, so that will probably need rewording a bit. But my main point, please include something about refreshing the page. A lot of support requests get opened because someone has just failed to refresh the page, and I pass over support answers that don't mention refreshing, when they have an otherwise good answer. Since I consider this information so vital, it makes sense to update the FAQ.
i didn't mean to sound quite so arrogant in the last bit. just because i think something does not make it The Way :p