If Airbnb started today, which platform (web or mobile) should they start with and why?

It depends a lot of in the skill sets and experience of both people but in most cases the ux designer should be controlling the developer pretty heavily in order to make sure his ideas come through properly. The UX designer may just need to work on his approach so people don't feel bossed around and more like they are working together. In an ideal world, there would be a project manager who makes sure everything is communicated well and keeps the dynamic feeling great.

I second invision for showing quick online prototypes, but for something more versatile, i use AxureRP (www.axure.com) . The ability to build a sketchy wireframe or a pixel perfect app is amazing. I love it. Great for mobile gestures and animations. Go check it out - they offer a free trial. Contact me if you want more info but they have awesome tutorials on the site. I taught myself everything.

I have designed a few of these online marketplaces and I can tell you from experience that in this day and age, phone numbers are a deterrent on a signup form. I advise against it and agree more with the cons. However, that does not mean that you cannot get feedback from students. Form the past websites that I have built with student demographics, I have found that they like to interact with each other, so a better way to get feedback is to set up a forum in your online marketplace. Also, just adding a comment thread like blogs have is a very good way to get feedback, even more effective than phone numbers. Also, one reliable method that I found works is an incentive based feedback survey when students can earn pennies on the dollar to take surveys. If you go this route, you could offer 25 cents or $1 or even $5 to the first 20 or 100 students that fill out the survey answering all your questions that you would normally have asked over the phone. I hope my suggestions are helpful to you. I can always assist you in building your online marketplace. I have more suggestions for you as well. Bruce

We have been collecting usage data on the home button from about 750 websites we manage across North America in an effort to try to determine if it is necessary or not. While each website is different, and much of the data is statistically insignificant, we have started to operate with a few assumptions. 1.) Most users, particularly younger users, recognize the logo as a way to get to the home page. 2.) Websites without home buttons seem to get a comparable amount of traffic to the home page as those that do not. We don't see a significant difference between having a home button or not. 3.) Websites without a home button often will see an increase in direct traffic from returning users during a session indicating that users who do not know the logo is a route to the home page will instead clear the address bar back to the root domain to get back home. Based on our research, we have decided to omit the home button in most instances. Although when it is present, it is often used, most users seem to understand how to get to the home page regardless of the inclusion of a home button. With the complexity of modern websites, we are usually pressed for space in the header and can better use the real estate that would be dedicated to the home button for other UI elements. That said, if the audience for our website skews older, we will still include the home button. Our research has indicated older users are less familiar with the concept of the logo being a home button.

It varies and it's very very specific to what you want to develop. The concrete design of your circuit matters. Also prototype building costs are usually a factor 10-100 higher than series. If you already have your prototype then you can shop around various manufacturing companies. To do that, you need Gerber files (your PCB design) and a bill of materials. You also need to think about casing: designing it and creating the mold is expensive. If you don't have your prototype yet, I recommend having it engineered in eastern Europe. Custom engineering is cheap there and high quality. IP protection is a problem. One thing to do is to distribute the work to different manufacturers. For the design phase you are safer if you design your prototype in Europe or the US where international patent laws apply. I could give you more specific advise in a phone call, getting to know a bit better what you are trying to build.