Hello Dear Thoai,
I'm interested in your project & i understand that you want a customize some features like synchronize(images from /wp-content to an Album on picasa, new uploads, image edits) into picasa plugin & I've reviewed the reference plugin Imgur Plus.
I do have experience in WordPress(Along with custom plugins & theme development) that is hard to come by.
Moreover, I've ultimate PHP skills so i can easily change all of your requirements into running code.
I can assure you that you will like my work. & please feel free to ask any query if you have in you mind. I would happy to answer you till your satisfaction :)
Thank You !!!