As an example here's a .doc file (MS Word document) uploaded by me:
From their FAQ section, I considered these points as important for you:
What kinds of files can I embed?
- Pretty much any kind of document, image, or text file. To be specific:
* Documents: doc, docx, xls, xlsx, ppt, pptx, pdf, wpd, odt, ods, odp
* Images: png, jpg, gif, tiff, bmp, eps, ai
* Text: txt, rtf, csv, html
What's the largest file I can upload?
- 20 megabytes.
Can I make an embed private?
Can other people embed my file?
Yes; since everything on embedit.in is open to the public, there's nothing stopping somebody else from copying and pasting the code from your webpage or blog.
If you think about it, there would be nothing stopping people from downloading your file and copying it to their website, anyway.
Can I download the file later?
You sure can. Use the button with the arrow on it: Download_button
*Update: Embedit.in has been acquired by Box.net
Box.net being an experienced file hosting service, now you may expect an uptime of 99.9% for Embedit.in too