Verizon has recently opened up their mobile DVR control page that will allow FiOS users to control and manage their DVR from any web connection. I should point out that this was previously available, however only through a few Verizon phones, the good news is that now it is open for everyone.
Current FiOS users can simply point their mobile phone browser to http://m.verizon.com/tv then login and begin to take control. Once logged in you will be able to review, change or add recordings and delete recordings. You can also browse and search TV listings and video-on-demand listings as well as set parental controls and more.
Now if they could just integrate a Slingbox-like service into their service and let me enjoy that on my mobile phone I think I could be that much closer to truly feeling satisfied.