Have you looked at Anthios's build and philosophy post (The Classic Rocker)?
There is a good bit there about the benefits of full char (few if any) vs. full str (many). In a nutshell, full charisma build is primarily useful for spell DC casting, and adds little to your healing potential. At the moment, the charisma-based weapons are a leaps and bounds behind traditional weapon types in terms of dps. It's no fun meleeing if you hit like a wet noodle =P.
For a TWF version in the spirit of Anthios's build, I'd make 3 tweaks: 1] drop 2 points of str (to 16) and 2-4 points of char (to 10 or 12) to boost dex for TWF feat chain requirements, 2] cleave feats -> TWF feat chain, 3] stick to racial weapons. That bonus tohit/dmg on racial weapons will make quite an impact leveling and at cap.
When the enhancement pass hits > switch maximize for empower healing (much more powerful healing feat, especially with ED twists), and also switch out Toughness for Extend.
That being said, what advantages are you trying to get out of a max charisma build? Is it just bc you are short on gear, and want to use what you have laying around? If that's the case, I would suggest building smth like Classic Rocker, crafting some greater bane weapons (temporary use), then head over to Vale of Twilight (do you have that pack yet?), and cranking out some greensteel (litII or triple pos are both excellent choices for a first). It's a little bit of work, but you will have much more fun with your toon in the long run, short run, all runs. If you are lucky enough to have BTA crafting blanks, you can even reuse those crafted weapons on any future toons you plan on building! (if you have a shared bank).
Bard DC casters by design are a bit short on sp. That will change a bit with the enhancement pass, but I definitely would suggest trying a full melee/heal bard out and comparing for yourself to see what matches your build concept better.
WB and happy hunting.