There is a lot of noise in the space and a lot of competition, and as someone new entering the space, we definitely have a long way to go. We've only setup a team and started working on Minus full time about a month ago here in NYC. The vision behind Minus is and will be focusing on creating a simple and universal sharing experience.
Minus will evolve over time and we are open to all suggestions and feedback on how to improve and hopefully you'll think differently in few months :) Not sure if you saw, but we have many apps also available via http://minus.com/pages/tools that we're working on simultaneously and improving along with the web front.
Thanks!
Listen, I'm glad you are enthusiastic about your product and I wish you guys luck. But, seriously what is not simple about Dropbox? Are you hoping to grab market share simply by offering people free space? Who is dying to switch over to your service over Dropbox (or any other large competitor)? OR are you just trying to go along the journey to see if there is anything in the market that will differentiate yourself?
If you don't have one, my suggestion is to start with native folder support. I use Dropbox because I don't have to use my browser to use it. That would be a good place to start.
But "we spent 100k on a domain name for a non monetised service which competes with dropbox file hosting on one hand, picasa and imgur on image hosting, letscrate and sendoid on file sharing, and has nothing to match Dropbox on the high end, and is 'just' framing S3 storage" screams "hello? Bueller? What are you doing?"
I can get 25Gb free from Windows Live Skydrive with Microsoft behind it, soon to be 5Gb free from app-integrated iCloud with Apple behind it, 5Gb free from JungleDisk, 2Gb free with industry leading sync from Dropbox, and miscellaneous 10Gb free from 4shared.com, 50Gb free from Adrive.com temporarily, 1Gb from freedrive, 1Gb from flipdrive, 1Gb from fileden, (and stuck in the past there's 20Mb from filegenie).