Make sure to take a look at the video below! It shows a lot of what they're working on, and their new Combine soldier models are particularly impressive. RTBR is distinguishing themselves as a mod team that are moving away from the established HL2 Beta lore to create something unique yet familiar, and this is an excellent undertaking.
And also check out their ModDB page - it's amazing. The new maps are looking particularly detailed, and I'm sure they will continue to grow in scope and quality as the mod progresses.
Check out the ModDB page by clicking here.