Hi,
have you tried the style selector here at hairboutique.com? They offer updos as well as wedding hair styles, maybe you find something you like there?
Hair-News has some beautiful updos as well, I especially like
http://www.hair-news.com/imageJ1E.JPGhttp://www.hair-news.com/imageT2H.JPGhttp://www.hair-news.com/imageLI2.JPGand
http://www.hair-news.com/imageQ5K.JPGbut you might want to check it out yourself.
www.hairdos.com does have an occasional updo as well, take a look at style 1050, 0753, 0752.
I wish you lots of fun at your friend`s wedding and the best wishes for her! I "just" got married 18 months ago and I still remember how nervous and excited I was - and everyone else around me.
Good luck!