I've been hearing about how people synchronize their things libraries using Dropbox but didn't get around to actually installing it myself until last night. It's one of those things you do and ask yourself: now why didn't I do this sooner? So if you haven't made the leap I recommend you do so now and sign up for a free account.
With a free account you get 2 GB of storage. If you need more disk space you can sign up for one of the paid plans. For me I think the free account should last me a while, for what I plan to use it for (synchronizing files I need to access both from work and home across mac and PC platforms, stuff like pdf files I send customers or mindmaps using Mindjets's MindManager).
And if you use this link powered by the Dropbox referral plan, you and I each get 250 MB worth of extra free storage when you sign up. That's how I finally came on board: I signed up using Fokke Koistra's invitation link in his Feb. 28th blog posting "Dropbox - part of my GTD system" on his Netherlands based Productivity 101 blog.
So do us both a favor and sign up using the invitation above!