My parking brake and battery lights are flashing/stays on together as I drive. Doesn't really matter what I'm doing at the moment, it's almost seems random. I can just cruise along the freeway at 70 or sit at a stop light and then it flickers, some times it stays on for 30secs. I had my alternator checked at a local shop and they say its well within spec. Also replaced my battery about 6 months ago. Any ideas?

Odd...
As for the brake light, check your brake fluid & pads.

Battery light- Would lead me to think low battery under 13.0

You're alternator is toast. Both lights are tied into the alternator's charging system.

How thoroughly did they check the alternator? It is possible to have bad diodes and still see the proper voltage when checking with a meter, but the output will be "dirty" and will cause problems such as the intermittent warning lights you are seeing. For a full alternator check/diagnosis a scope should be used.