IMPORTANT
The Tekkit server now runs Smart Movement (Go svck on an egg, Lego). Smart Movement is a mod that allows parkour, improved swimming, crawling while prone, sliding, etc.
The mod includes animations. HOWEVER, you need to install the mod client-side to be able to use the new features and possibly see the animations (That's logical, I haven't confirmed the latter myself).
You CAN still play on the server without the mod installed. You just won't be able to do any of the cool new stuff, and people who do do it may like strange.
Download link here: http://tesfan.mchost.org/downloads/smartmovetechnic.zip
To clarify: SmartMove allows advanced movement, better animations, and is generally just pretty cool without taking anything away from minecraft. If you choose not to install it, you will still be able to play without any issues, other than only being able to see classic minecraft animations.
Installation to an alread setup technic install is as simple as downloading the .zip, extracting the contents and copying all the files in the "SmartMoving Client for ModLoaderMp" into your minecraft.jar by opening it with your favorite compession program(7zip, Windowsixplorer, WinZip, ect).
SmartMove is not currently setup to the vanilla minecraft server.