Spent a little time searching and found this advice by Brian Brown-Cashdollar from the Yojimbo Talk Google Group:
1. Turn on idisk syncing (it doesn’t seem to save to the idisk without
syncing turned on)
2. Then go into Yojimbo and set the sidekick directory to somewhere in
your idisk (for example you could pick a subdirectory like documents -
but probably you don’t want public
3. Then on your desktop launch safari and go to:http://idisk.me.com/username/subdirectory/Yojimbo/index.html
4. Save a bookmark in Safari
5. wait for Safari to sync with your iphone and open the link
6. you will be prompted for your mobileme login
7. Most items seem to be visible except I couldn’t see my encrypted
notes.
The address for the complete thread is here.
Another popular solution is an application called FileMagnet which I wasn’t familiar with before. You can read about FileMagnet here or view it in the App Store here. As of this writing it costs $4.99.