Putting iBank on Dropbox I'm wondering if anyone has put an iBank file on dropbox and accessed it from different machines. Are there any gotcha's or will it work just as if it was residing locally but with the benefit of accessing one file from multiple machines ?
Dropbox works for me using multiple computers with a single iBank file.  It's good to set iBank to automatically backup its files onto Dropbox also.  The only caveat is if you open your iBank on a second machine before the Dropbox has updated with the file from the previous machine.  In that case you'll have two competing iBank files trying to update on Dropbox. 

The fix is to disable backup/sync temporarily, delete the iBank.ibank file from Dropbox, and restore the iBank.ibank file from the backup.  Then enable the normal backup/sync procedure.

I rarely have to go through that procedure, though.  Just keep an eye on your Dropbox folder when using a new machine, and wait til it's updated before using iBank.