I've been looking high and low, but i haven't been able to find any smooth-scrolling solutions for a tile-based game, Any suggestions?

Also, how to limit the framerate so one keypress doesn't send the player halfway across the screen?

Thanks in advance

Be creative, it's all just simple math. If you want scrolling that feels like it has a bit of inertia, just use 95% of the old camera position and 5% of the desired one, i.e.

target_cam_x(/y) = ...
cam_x(/y) = 0.95 * cam_x(/y) + 0.05 * target_cam_x(/y)


And don't limit the framerate, just change the response to the key being pressed. You can use a variable to start a countdown when the button is first pressed, decrease it to 0 by one step every tick, and only then move one more tile, reset the countdown etc. :)

Thanks for the help, and I may be going into beginner-ish stuff here, but i'm a bit confused on how to implement a camera.

You can look at CptnRuby.rb for a basic (totally non-smooth) camera, it's being implemented via screen_x and screen_y variables that are then simply subtracted from all drawing operations. I am a bit hesitant to implement a more complex, smooth camera because there are so many ways to do it, and I don't want to force my design ideas on anyone ;)

Support for automatically adjusting the positions of a series of draw calls has been discussed here: http://www.libgosu.org/cgi-bin/mwf/topic_show.pl?tid=359

This still does not include the logic of the camera's own movement though.