Of the ones you submitted I like #1 the best. I am curious to have the house come after or perhaps a globe. I dont want anything that looks cliche. Keys could work as well other symbols might be a chain or puzzle pieces linking. If I had a tag line it might be something like "access is everything".
a concept I am seeing that I am interested in is simple text where cobroke and nation are the same font and style are with some kind of house and a radio wave is coming from the house. The site is for urban areas as much as suburban so putting a sky skraper in the i or the t could work or whatever. Logo needs to be bright so a bright red is good.. the radio beam you might want to try in red, blue, yellow, and or purple combos.
if I have a tagline it might be "access is everything" but I am not 100% committed to that.
radio waves, talking bubbles, chain links all great symbolism for this website. I am really looking for a web 2.0 simple logo more then anything as this is for the web. I want something that feels unique. You are all doing a great job.. there is so much talent here. I hope my feedback has been helpful.