Could have on the backs too, like I host with Lunarpages in multiple Languages...
spanish, english, swedish, japanese, chinese, russian or whichever other language...
We have customers across the entire world i think 'regional dialect' featured on the shirts would be cool..
"taking your site higher"
Make sure it's not just a 'literal' translation cause that could be terrible.
i like the multi-lingual idea deffo, but i wouldn't wear clothing with "i host with.." on it. it begs the question what these t-shirts are meant for, i suggested some which had double meanings (none rude) in line with the "edgy company" description and ones that could be worn outside an exhibition setting. i certainly wouldn't wear anything with a cheesy corporate slogan on it and don't see the problem with "higher" either (if it's good enough for the website then why not a t-shirt?)
if you're attempting to catch someone's eye then you have to make them think twice otherwise you may as well go down the "i'm lovin' it" or "where did you want to go today" route.