Phar ... brilliant, a couple of questions?

to Greg and his cohorts a hearty bravo! Phar is a really great addition, I'm very impressed with the finesse of the initial implementation ... it's quite rare to see [imho] a new feature appear in such a mature and well thought out manner, good work 'smith. :) I have a few questions, some of the answers may deserve a few lines in the docs. 1. to what extent is Phar capable/designed to handle self updating Phars .. especially with regard to multi-user access (I'm thinking in terms of a website+CMS+userdata in a Phar updated by a few people 'concurrently') 2. is there a (quick) way to reference a Phar object of the current (as in Phar::isRunning()) Phar file - I figure the engine can do new Phar(Phar::isRunning()) faster/better, no? 3. are there technical reasons for not being able to create/access an sqllite db inside a Phar? 4. Am I crazy to think of building a dynamic website, cms, including all user [uploaded] files, installation config .. complete with command line interface for updates, upgrades, module/config management, etc, etc ... all in one Phar? is that feasable? what kind of read and/or write concurrency could one expect? if building self updating Phars is okay, then maybe an example in the manual could be done to emphasis a few do's, dont's, limitations, etc. kind regards, Jochem