I was quick out of the gate to buy this new app, and it is totally 5-star quality IMHO. The app has rotating animated Meego-style buttons, well-crafted layout, and works well for each of the three modes (mirror, camera, and video capture). The landscape/portrait landscape modes are available and work exactly as described in the OP.

Note: the app works great, but I did do a quick uninstall/reinstall and a couple of reboots to get it grooved in. Could be my device's issue, because it is heavily modded (go figure) and somehow my 'Camera' directory had to be mkdir'd, but it's all good.