Something you <i>really</i> need to fix at Dropbox is multiple account support.  The frankenmonster where you psuedo-merge exactly one personal account into exactly one business account might have seemed clever internally, but is a mess and <i>not</i> what we want.  Google do a good job on multiple account support - learn from them.<p>There is usually some pitiful excuse about free users being able to abuse the system, but screwing things up for your paying users (all my personal and business accounts are paid) is stupid.  The major thing keeping me and related companies going with Dropbox now is that you support Linux.  If Google or someone else fixes that then you are likely toast!