AVR-Chat

Hi everyone,

I'm going to take the step away from DIP, to TQFP!  WOOO!!!  My next
design is going to use the Mega16 in the 44pin TQFP package. 
Obviously I can't use my STK500 to program it anymore.  So - what do
you use?  

I've heard people mention a "JTAG"?  Does that allow complete
programming?  Fuses and eeprom too?  Any special tips I need to know?

My second question, is how reliable is the internal RC clock?  It's
tough for me to trust them, so I have been using an external
crystal... but... in the interest of real estate, costs, and ease of
assembly, I'm considering switching to the internal clock.  However -
one thing I'm concerned about is the RS232 interface.  If the internal
clock is 7.9mhz instead of the desired 8mhz, will that make a
difference?  How are tolerances?

Thanks in advance,

Ryan