Anyway, the Livejournal Birthday Reminder is a Microsoft Windows program that will periodically warn you of any upcoming birthdays your livejournal friends may have.
It was recently rewritten using the livejournal protocol because the new session based cookies have caused the original version announced in lj_nifty to stop working.
Some of the new features, and upcoming features, can be read about in this post in the hbdlj community. This community is also the preferred place to ask questions, make suggestions and report bugs.
Happy Birthday !