This past June, we noted that Twitter had zoomed past 200 employees — basically doubling in just six months. The rapid hiring pace continues at the startup, though not quite as quickly. The company has just hired their 300th employee a tweet confirms today.

And with that growth comes

Last week San Francisco car matching startup UberCab was served a cease and desist order by the city of San Francisco because it did not have taxi licenses or taxi insurance and went beyond the normal scope of a limo service by picking people up right away.

As UberCab (which has now changed its name to Uber) serves primarily