If your mobile device has a Web browser, access your Remember the Milk tasks at m.rmilk.com. You will need an active Internet connection, but no syncing is required.
You can do TRO without a syncing smartphone, no problem. If you ever work away from your desk, print out your Do Today list, make notes on it, and process the changes each day. Some people love this.
You can also use your mobile calendar to see a mobile Do Today list away from the office.