It looks like you won't have to wait long for developers to get geared up for Samsung's latest beauties -- the Galaxy S 4G on T-Mobile and Galaxy Tab 10.1 (the I/O edition only for now) have both been given official support by ROM Manager. We all know that once you make it easy to flash custom zip files to a device, people will start building those flashable zip files. I was told to expect the retail version soon, along with a root method.
Of course, you do need to be rooted and aware of all the risks involved. Once you're comfortable, and when your version is ready, you can download ROM Manager from the Market. We've got the link after the break.