I'm also a massive Linode fan, but here's my monthly HE-Fremont Data Center rant... don't run anything out of there (regardless of whether it is through Linode or a 3rd party).
The overal quality of their (Hurricane Electric, not Linode) operation is poor, historically they have been lax on shady people colo'ing rack space in Fremont (google hurricane electric mccolo), HE-1 is full and so little room for expansion and its on a fault line.
I've NEVER had any of these problems in Newark (which is Linode's geographically local DC as they are in NJ) or London.
If you do want to move, you can put in a ticket and they can move you between DC's with no downtime I believe or just replicate your instance and switch IP's.
For those of us in AU, the Fremont DC is the best choice for us Linode customers.
However, I've learnt, and hopefully have others, that having everything in one basket isn't the best option, even with how excellent Linode are, they are at the mercy of HE etc.
So now we have a split between Fremont, Dallas & Newark.
It's worked pretty well, we are most happy.
Anyone running a large app or site would do well to run multiple systems with Linode across multiple sites where possible.
