I am finally sick of JungleDisk & .Mac or MobileMe (I am up for renewal). Jungledisk does not have native syncing abilities and seems to have trouble on my Macbook staying active when I change from Wifi to EVDO and back it does not like to re-mount the drive. It is also difficult to update my music and picture files from computer to computer. For example, when I upgraded a music track from DRM to non-DRM in iTunes, I had to manually replace it on each computer and on the online storage. It is good for back up of each computer separately, but not for keeping one back up to use on all computers & share.
I do use Dropbox, and would love it to be my one solution for everything, however, it has only one paid option for 50GB max. Also, the files that are synced must all be in the My Dropbox folder on every computer. I would love a solution similar that would work on Windows, OS X, and my iPhone, as well as, not tied to a specific sync folder. Thus I came across SugarSync. It has multiple paid options, thus I can upgrade as more space is needed, is accessible and managed from the web, windows, mac or iPhone, and you identify which folders you want to keep synced.
Others I have tried or found are MobileMe - which just did not work, Mozy - which I found cluncky on my Mac and lacking in sync like I wanted, Windows Live Mesh - worked well but only has a 5GB option currently.
There is a good chart comparing free online storage/sync solutions on Lifehacker here.
Pricing for Dropbox and SugarSync are as follows:
Dropbox = $9.99/mos or $99/yr for 50GB ($0.20/GB per mos)
SugarSync = $2.49/mos or 24.99/yr for 10GB ($0.25/GB per mos), $4.99/mos or 49.99/yr for 30GB ($0.17/GB per mos), $9.99/mos or 99.99/yr for 60GB ($0.17/GB per mos), $14.99/mos or 149.99/yr for 100GB ($0.15/GB per mos), and $24.99/mos or $249.99/yr for 250GB ($0.10/GB per mos).
Bottom line, I will use both for different reasons. I will use the Free 2GB Dropbox for quick file sharing between computers and SugarSync as my online backup and sync of music, pictures, documents, etc...across all computers and iPhone.
If you have a good solution for you that is different, let me know!
Update - With SugarSync you can stream you audio as well. This includes your iPhone. Full access to all my music on the iPhone is excellent.