Waterfield Designs makes some of my favorite slip cases and I have them now for my MacBook Pro, Kindle/REDFLY, and MSI Wind. The MSI Wind is a very popular netbook and Waterfield is known for quickly providing cases for the latest and greatest devices. They make cases for much more than just laptops too and I was sent a sample of a T-Mobile G1 slip case to check out.
There is a large pocket on the back so you can store slim gear in the case.
My MSI Wind has the 6-cell battery and it fits quite nicely into the Waterfield Sleeve Case.
The MSI Wind is held in place with a strong flap and velcro connection. The case is well padded and has solid construciton and assembly.
Waterfield makes a basic slip case for the T-Mobile G1.
Waterfield includes a description of what to expect from your new Suede Jacket.
Here you can see my T-Mobile G1 with BodyGuardz case ready to place into the slip case.
The Suede Jacket fits well and offers some basic protection for your G1.
As they said, the fit is tight at first. Over time, your G1 should fit a bit better and make it easier to insert and remove from the case.
The Suede Jacket is simply, but useful for protecting your G1.