I have previous written about PDF Editors for Windows and Linux here and here, so this is, in effect Part 3.
I have used OpenOffice PDF Import Extension, PDFEdit and numerous other tools listed in my first posts but nothing works as well as the latest Inkscape. It has one downside though, right now. That is, you can only edit one page at a time.
So here’s a random PDF I found by googling for random PDF ;). Here’s a shot of the first page in my PDF Viewer (evince).

Now we open …

One area sadly lacking in most Linux installs is the availability of really nice fonts useful for design and great fonts are not cheap, circa $150 for a font set. Best all in one location for getting great free fonts, I think is www.fawnt.com
If Ubuntu really wants to have a go at competing with the Mac, this is certainly an area that needs improving.
You can install fonts system wide by dropping them (or folders of font families) into /usr/share/fonts or alternatively, kfontviewer a KDE application will give you a nice …