Personally I like ‘designkube’ logo: http://dribbble.com/shots/40497-DesignKube and the way an image of a box is used for letter ‘u’. Maybe something similar between the double ‘xx’ in madboxx.com. the 2 xx’s next to each other create an illusion of a box between them. I would like to see something new and fresh that would speak: innovation, web technology, future. 
I’m open to any suggestions and your creativeness. Thanks a lot! 
 
here are some other logo concepts i like a lot: 
 
I like http://www.48hourslogo.com/project.php?id=1479 (#22 by yokorama) I like the 3d glossy look. 
 
http://www.48hourslogo.com/project.php?id=1476 
(#5 by jhox) 
 
http://www.48hourslogo.com/project.php?id=1455 
(#26 by jasi) 
 
http://www.48hourslogo.com/project.php?id=1437 
 
http://dribbble.com/shots/51838-Clients-chosen-logo 
http://dribbble.com/shots/51266-Cortex- 
http://dribbble.com/shots/51105-Timely-App-logo 
http://dribbble.com/shots/51100-Logo-with-Glass 
http://dribbble.com/shots/33113-Veliso-Logo 
http://dribbble.com/shots/44222-logo-techno 
http://dribbble.com/shots/42967-PS-Logo 
http://dribbble.com/shots/42432-car-news-logo 
http://dribbble.com/shots/40914-Oenolabo-Logo 
http://dribbble.com/shots/40767-Logo-health 
http://dribbble.com/shots/40497-DesignKube 
http://dribbble.com/shots/40562-Brokers-Direct-Logo 
http://dribbble.com/shots/39738-Peppermint 
http://dribbble.com/shots/39563-Ambush-Networks 
http://dribbble.com/shots/38438-Logo 
http://dribbble.com/shots/38436-Semsoft-Logo 
http://dribbble.com/shots/37334-Wowize-Logo1 
http://dribbble.com/shots/36310-Noe 
http://dribbble.com/shots/36036-Captaine-Train-Logo-Concept 
http://dribbble.com/shots/33871-jasonbolton-com-logo 
http://dribbble.com/shots/33836-Hormone-Therapy-Logo 
http://dribbble.com/shots/33417-Getting-there

Good work Luke, 
thanks for an awesome looking logo!