Cucku, a free, online social back-up tool has released a Skype Extra which allows Skype users to back-up their data with other Skype users. All you need is a Skype account and the Extra which you can download here. Given that Skype is the unsung hero of the humanitarian community this tool could prove useful for those field users concerned about field security since Cucku allows you store data offsite but still keep it within your organization.