[TxMt] State of autocompletion in Textmate

[Ruben Bakker]

I'm interested how it would be possible to create an autocompletion
plugin/bundle for Textmate and ruby. I realize there is ESC, but I
would like to open a menu with say CTRL-SPACE and then see all the
possible completions based on the entered characters. Then when I
continue typing in the editor, the menu adjusts it's contents to show
only the matching  entries. The user can navigate the menu and choose
an entry to be inserted in the editor. Like auto completion in
eclipse, Visual Studio or XCode.

I found this article:
http://macromates.com/blog/archives/2005/06/09/code-sense/ and wonder
what the actual state of code sense is in Textmate. Is it possible to
create a Plugin/Bundle that controls an auto completion menu?

Ruben