I haven't done much on this to be honest but I did get in touch with the only person I know that has done a triathlon. Padraic, is living in Boston these days but he only left Ireland a year ago.
He did his triathlons in Ireland and I have mailed him to ask his advice on bikes. I want to get a decent starter bike and I want a bike that won't detract from my performance (come on! the only detraction will be me!)!
Baby steps eh?