I've always used bond paper, b/c I heard that it makes your resume stand out from people who just use plain paper. However, I don't think weight is as important as it used to be, considering that so many jobs just want electronic versions. one thing to consider [ i learned this the hard way
] is turning you resume into a PDF file, rather than word or wordperfect. This ensures that when you email it and they open it, all your margins and symbols will remain the same. I emailed my resume to a firm that used a different word processing program, and when they opened it, the margins were jacked, and the simple blocks I was using for bullet points turned into freaky characters! I have also turned letters of reccomendation into PDF files so I can email them to prospective employers.
Good Luck with your hunt!!!!!