Anyone who has taken the time to look at Twitter can not fail to be struck by its potential for humanising business and the marketing opportunities inherent therein - (FreelanceWebDev).
One thing that has surprised me though, is how little work organisations and professionals in Ireland have put into their branding there. Even those in the business of offering branding as part of their service and those who's main interface with their market IS the web, seem to fall short in this regard. When you look at the efforts kids put into the look and feel of their Bebo profiles you start to realise the increasing importance of this aspect of your presentation.
Successful look and feel branding on Twitter means you need to respect a few constraints in the layout of the pages and you should note how those change for various screen resolutions but even designing for the most common resolution currently of 1024 x 800 will have a big impact on the perception of your Twitter page.