neu.Annotate PDF 1.32
the author of this app says:
Read and annotate PDF documents. Annotate with drawings, highlighting text, text notes, photos and stamps. Annotations are compatible with Apple Preview and Adobe Acrobat!
PDF files can be opened in neu.Annotate from any application that supports the "Open with..." menu command. This includes Mail, Safari, MobileMe iDisk, Dropbox and many others. PDF files can also be imported using iTunes File Sharing.
iOS 4.2 or higher compatible with iPhone, iPod Touch, and iPad.