Online account management after death
Death it is not a possibility but a certain fact that only depends on when and not if, it makes sense to prepare a list of all your valuable online accounts like Paypal, Google account, Flickr, eBay, Amazon, Hotmail, domain registrar accounts, etc, for your loved ones.
You could store all of your digital accounts user names and passwords inside an encrypted file and tell your next of kin what the password is, with instructions to open it up and seize your digital accounts after you die, or you could use an online trustee that will take care of all of your digital assets and pass them on to your selected beneficiaries.
The companies managing your online accounts will verify that you have died before carrying out any instructions, you can leave a last email to be sent after your death, including attachments with photos or documents, some trustee services can be directed to update your social media accounts (Facebook, LinkedIn, Twitter, Flickr, etc) announcing you have died.
Online legacy companies
Life Ensured: They keep an an irrevocable trust fund made up with part of the payments they receive for their services, this guarantees that the company will not go bust before your death, you can leave with Life Ensured any on-line account which requires a login and password or any file (with file size limitations), it works outside the US.

Life Ensured account management after death
Legacy Locker: After human verification process of your death or incapacitation, Legacy Locker will grant access to your loved ones to your digital accounts and digital documents or photos stored with them, until then, all of your stored data is kept encrypted and nobody can access it, not even the company can view your data.

Legacy Locker online trustee after death
iDeparted: Any online account with a password and a username can be left with iDeparted, there are various plans available, the basic one transfers your passwords and usernames to your designated person after death verification, other plans can instruct iDeparted to disable your online accounts after your death.

iDeparted digital legacy management
Entrustet: You can store memberships, passwords and digital files and nominate a digital executor that will take care of your will. All of your data can be updated to add or delete accounts, all of the online account details are kept encrypted and only released to the beneficiaries after your death has been verified.

Entrusted account management after death
MyWebWill: It works in all countries, MyWebWill will encrypt the online data you give to them and only decrypt it after they have been informed about your death via your designated verifiers (real people). This online legacy service works with social websites LinkedIn, Flickr, Hotmail, Photobucket, Netlog and dozens of other online services.

MyWebWill digital inheritance management