Good day!
There is a number of similar questions here, but I'm particulary interested in such aspects of building single-page web applications:
- What server components are well suited for a big number of AJAX requests (maybe, Node.js)? My server platform is *nix (Debian) and PHP. 
- When and how I need to replace AJAX with COMET and can I use the same server side? 
- What javascript frameworks can help me to organize client-side (I mean MVC, MVVM, client templates)? 
Any good points on overal approaches and architecture patterns are really appreciated.
Thanks!
 
     
     
     
     
    