Our tagline is "It's in the dot". The logo must be usable with and without the tagline.
We have to be able to attach a second word to the logo, so the name becomes "Cu.be solutions" or "Cu.be services" for different departments.
Having a cube shape somewhere would be nice (since the name without the dot is cube), but certainly not a requirement (a logo without a cube might be better).
Keep it simple. No extremely complex logos, no excessive gradients, etc. - if you do make it complex, make sure you also have a simple version which we can use on letterheads.
Note : it's cu.be, not cube ! The dot is important, since the URL is http://cu.be
So the dot must be clearly visible and preferably not part of any of the letters.