I've been emailing my resume using the Google Docs url (read only) and it works well. There are rarely any issues with someone being able to open it, versus a pdf or doc. Those might cause issues if you don't have Word or Adobe installed, but no installation means a better experience for the person on the other side. Sometimes Macs will format PDFs oddly in Preview and other issues always arise with doc and docx unless you are sure they are on Windows with Word.
Sending a Google Doc also allows you to edit it even after you send it. You can even see when they view it if they are logged in. If they don't like it, you can always just save it to your hard drive as a doc or pdf and send that.
The ability to edit after you send is intriguing and something I hadn't considered. Of course assuming the first thing the recipient does isn't to download the document.
It might be the first thing they do, but if they don't check their email immediately you have until they print/download. That window of 5 minutes to 6-8 hours or even over the weekend is worth using Google Docs alone.
Do what you think represents you most. Depending on the size, creative resumes can really help. Smaller ones prefer more creative people that show an ability to be more versatile IMO. Good luck!
PDF is almost always the safest choice and make sure you include your LinkedIn account. That goes a long way.
Sending a Google Doc also allows you to edit it even after you send it. You can even see when they view it if they are logged in. If they don't like it, you can always just save it to your hard drive as a doc or pdf and send that.