If you are antsy about getting your hands on the Samsung Galaxy S III, then here's something that might satiate your appetite a little bit. You can now peruse the full user manual for the SGS3. It is available in .pdf format for download, and is quite lengthy at 186 pages. It may not be anywhere close to being as cool as the actual phone, but a small dinner salad might tide you over for a short while. (Hmmm... can you tell I skipped breakfast this morning?)
Obviously, some of the details may change if the North American version comes with a different processor. The phone is scheduled to launch on May 29th in Europe and will release in North America the following month. Here's a download link: Support for GT-I9300
Source: Samsung