I'd like to announce volCAMERA, which is a powerful and highly customisable camera solution for Fusion 2.5 that I've been working on for a while now, and have just completed. Features include:
-Smooth linear interpolation (LERP) with customisable speeds
-Tweak camera settings on the fly with the fully-featured HUD
-The same camera engine that is used in Spryke
-Well commented code
-Highly modular (easy to use any combination of features you want)
-Up to 4 directions of overshoot (a.k.a. camera lookahead)
-Snap or LERP to boundaries
-Camera can snap to boundaries or cushion against them with LERP
-Press a button to save current camera settings to TXT file that explains how to implement them in your game.
-Designed to be as easy as possible to plug into your own game (intermediate knowledge of Fusion is still recommended)
-Supports side-view games by default, but could easily be adapted to a top-view game.
Here's a video showing it in action, and explaining all of its features and settings:
volCAMERA is available at the Clickstore for $2.99
Also, for a really great article about videogame cameras, with tons of animated visual examples, make sure you check out this Gamasutra article.
I hope it's useful to you!