Hi. I tried to find the similar question here (in google groups), in the FAQ and in the API, but couldn't find anything.
The problem: Cross-posting the links to the user page and to some his statuses in the web become more and more popular. But, as i understood, you can't guarantee that this links not long after would not change the logical destination. For example I create some post about some twitter-user "aaa" and give the link "twitter.com/aaa" After that user “aaa” changed name to "bbb" and user "ddd" changed name to "aaa". So my old link now points to the different person. This problem becomes more serious for the aggregators that don't know what content they might approve after a while. The simplest decision would be providing the possibility to link to the user not by name but also by id. That pages might be just redirections to the original user pages, it doesn't matter. For example if the user “aaa” have id 111111, the following two links should point to the same page: twitter.com/aaa and twitter.com/id/111111 This mechanism should also be applied for the statuses: twitter.com/id/111111/statuses/222222 Ivan.