Some suggestions:

Eclipse + schemeway - i hate eclipse myself but there you go. not sure if it supports chicken.

Emacs + VIper - you should be able to set to viper to have emacs keybindings close or equal to vim. You might wanna try quacl.el on top as well as scheme-complete.el (distributed with chicken). chicken's hen.el is ok as well... not as good as quack imo.

I use emacs myself, and I know nil elisp, apart from the (add-to-list 'load-path "/blah/blah") and (require 'foo) needed to load 3rd-party elisp filed.

Theres also SLIME, but it hasn't got support for chicken (yet), thinking of adding to the CVS tree myself...

I've tried using vim for scheme editing, and its pretty awful to be honest - gedit or the kde equivalent do a better job...