Don't want to register? Use the public uploader.

Public?	Allow these files to be browsed by other users.
Your name	(optional)
Description
Select files
	Allowed file types (or a zip file named upload.zip containing files of these types): jpeg, jpg, png, gif, bmp, mp3, txt, avi, wmv, mpg, mpeg, doc, pdf, docx, rtf, xls, xlt, ppt, pps, mp4. Maximum file size is 50 MB

Click on Browse to select a file. Repeat to add more files.