Send notifications when user is refferenced in other user's post
Short, concise description of the idea
When someone posts an entry with user tag in it, send notification to that referenced user that he is being written about.
Full description of the idea
Allow users to recieve notifications when this user is being written about in another user's post. I noticed that some people search (using special tools like lj.crossroads.ru) who writes about them so it seems reasonable to implement such feature at LiveJournal, at least as not search through database but email notifications at the time when that post is made. It should use the same principles that are used in viewing posts/receiving notifications i.e. to allow to set the same settings of users which posts are accounted (i.e. all/only from friends/ not send at all), to check if that user who posted entry is banned by reciever of notification, to notify only about those posts that user is allowed to see. Maybe also it should be checked for direct links to journals which are also used rather often instead of user tags.
An ordered list of benefits
An ordered list of problems/issues involved
An organized list, or a few short paragraphs detailing suggestions for implementation
In my opinion, most of the code changes will involve just copy/pasting and most likely even I could made it in several hours if I were familiar with Perl.