We like the direction of entry #4, but would like to try a different color (rather than sky/skype blue, something more dark/serious). Also, doing something else with the O so it can be used as a separate identifying logo would be great.
Can we try a variation that is more pronounced or unique? We like your concepts but the font style and overall logo design seems too simple. It may be the font, so it would be nice to try a modern and 'sexy' font style. We like the simplicity - but we'd like to make it a bit more professional - perhaps with a web 2.0 vibe, and a more recognizable martini glass rather than just a Y with a dot in it.