Depends on your methods and strategy, you can make it on top, Just don't try to look for loopholes or something, sooner google will found it. Strive for good long term rankings.
I Doubt That i use adsense on one of my site using http://www.desiscripts.com/ url script but didnt face problems
having a short url is just fine... it's a marketing strategy for many people to easily remembering your site.
hey buddy short url name just helps people in remembering your website name and nothing else apart from it and the rest depends on the traffic and SEO of your website ankur