Page Type: when new document with this type is created, trigger an action/invoke a delegate to allo

I actually meant to ask if there is a more efficient way rather than using global handlers; I implemented something similar back in 5.5R2, to do some “post-creation” processing of a given document (as per suggestion Martin gave in here http://devnet.kentico.com/Blogs/Martin-Hejtmanek/June-2010/New-in-5-5--Provide-your-classes-from-App_Code.aspx ) However, I was thinking of programmatic constructs attached to the document/page type itself – as a slicker and more efficient way (we are a heavy implementation with thousand sites and hundred simultaneous admin/CMSDesk users) of doing this. Is that possible in K8.1 ?

Based on what you're saying about sites and users, I'd recommend a global handler because that is where you can catch all the info and events you need for that page type. Using a global handler isn't a hack by all means, its recommended and they work very well and have a lot of improvements since 5.5r2.