upgrading...

I'm looking into getting a reseller, and am considering a silver plan. Let's say that I eventually run out of space or bandwith, or something along those lines. Would it be possible to upgrade it to, say, the Diamond Plan? Or is there some seperate thing you would have to do? And just pay for overdoing bandwith/space? Or what?

You can upgrade at anytime, around 80% we will send you an email that you are running low on bandwith. At that time just go to www.hostgator.com/changes.shtml and use the upgrade form. The only charge is the difference for the time left of the month compared to the old plan.
Upgrading is almost-instant and no downtime will occur.