Overfilled V8, need advice

["Lewis Schnaper." <lewis@ukpik.com>]

Hi.  I'm the new owner of a 92 V8 and am still in the phase where I'm a
little intimidated by the "new" hardware..  

Yesterday the oil change place overfilled the engine (to a little over
the top of the little plastic limit marker on the dipstick).  Today I've
got a small puddle on the garage floor and a little bit of burning oil
on hard running.

Some questions:

Is oil coming out of a breather somewhere or (sigh) have I blown a
seal??

Is it safe to drive it like this (till I can get it back to the shop
that did the work on Monday) or should I have it reduced asap?

I'd appreciate a direct reply.

TIA, 

Lewis