Building Web 2.0 applications

[Lauxa]

I want to take my flashcards site to the next level by totally rewriting the application interface for users to create flashcards. I want features like flickr, with user accounts and the ability of users to rate and comment on all the comments. I want the images/sounds to be uploaded first, then for users to assemble them into flashcard sets via a click and drag interface. I also want easy user account management from an administration standpoint.

Are there some components I can just plug-in to get me part way there? Or can someone recommend a good book or online resource on building web 2.0 applications? I am currently using PHP with mySQL and Javascript for the implementation, but I can already see that some pieces have to be in Flash (the audio player is a pre-made Flash application, and I am thinking of using MultiPowUpload to enable multiple file uploads). Is it possible to get where I want to go with PHP or should I be considering a different approach?

Thanks in advance for any advice and feedback. I really want to break into web application development, see the link in the sig to look at the site so far.

[Niki]

I think if you are allready familiar with php, I would say you stick with that. Greetzz