Hey man, nice landing page. But there are lots of things that need changing:
-Information for website for tabs need to be updated
-Need attractive favicon
to see what i mean:
http://grab.by/czZC
I think you need a bigger logo, and definitely something that's not just text
Also, your main banner is way too generic; looks like you just googled and stuck it there. Get something designed and watermark it with your company name and logo.
You should also consider a top or bottom navigation bar, this is way too empty right now. Also you shouldn't really launch until your "ready" to present your product/service/sales. I get that you want the traffic, and you want the feedback, but it really turns people off when they click the only place possible and it says stay tuned we're launching soon- and people will definitely not put their email in. I sort of get the concept of what your trying to do, but you definitely need more information on the landing page, and a friendly HD video will definitely help also. I can go on and on, but if you want more feedback hit me up in private. I've been doing web design for local businesses.
Hope this helps.