You may send your resume as an attachment because today’s advanced virus detection programs eliminate the “threat” of infection.

If you send your resume to a recruitment site for inclusion in its resume database (monster.com, flipdog.com, hotjobs.com or the site maintained by your professional association), always DATE the document. Resumes in public databases are often copied and recopied by other sites so there's no knowing where your resume may end up. Dating the document, however, will avoid any embarrassment later when your employer finds that old document out there on the net.