According to Above the Law, the original iPhone jailbreaker, Geohot, was arrested for felony possession of marijuana while at an international border crossing on his way to SXSW. According to the report, the arresting border patrol officers may have been outside of their jurisdiction (and likely measured improperly).
Before you rush to judge the guy, remember Steve Jobs’ thoughts on mind-altering substances (and phone hacking). If you have jailbroken using any of the “xxxRain” jailbreaking tools, you have used Geohot’s work. He also recently worked at both Google and Facebook (and Lady Gaga’s BackPlane).