[Guest]

rapidshare.com or yousendit.com

The other two options are bittorrent or start up a private FTP using Filezilla Server (freeware).

Here are some more options that I do not personally use myself:
MegaUpload - <!-- m --><a class="postlink" href="http://www.megaupload.com/">http://www.megaupload.com/</a><!-- m --> (250MB for free)
SendThisFile - <!-- w --><a class="postlink" href="http://www.sendthisfile.com/info.jsp">www.sendthisfile.com/info.jsp</a><!-- w --> (2GB) for 3 days or 3 downloads.
FileFront - freespace.filefront.com/1 (1GB)
SpreadIt - <!-- w --><a class="postlink" href="http://www.spread-it.com">www.spread-it.com</a><!-- w --> (500MB)
BigUpload - <!-- w --><a class="postlink" href="http://www.bigupload.com">www.bigupload.com</a><!-- w --> (300MB)
UpDownloadServer - <!-- w --><a class="postlink" href="http://www.updownloadserver.com/">www.updownloadserver.com/</a><!-- w --> (250MB)
BonPoo - app02.bonpoo.com/ (250MB)
Updownload - dl2.updownloadserver.de/ (250 MB)