All major email providers have pretty low size limits for their email attachments. I believe Hotmail/Outlook uses Skydrive to attach files over 10Mb. Since, Yah

All major email providers have pretty low size limits for their email attachments. I believe Hotmail/Outlook uses Skydrive to attach files over 10Mb. Since, Yahoo doesn't have Yahoo Drive they partnered with Dropbox to do the same thing. It seems like a good move to me; get closer to functional parity with your competitors and utilize a very popular file syncing solution.