a: the battery isn't that effected, i think i've lost about 20 minutes of battery life. my girlfriend isn't really not noticing it. she's aware that it's not lasting as long but it's not enough to make a difference.
b: heat may be an issue, we'll see when the new drive comes in. as it stands, the 60 gig drive is taped to the bottom of the mini so obviously it's not much of a problem.
if heat becomes an issue i'll find some way to combat it. poke some holes in the bottom or add a micro fan or something.. who knows. the mini is sure more useful with a hard drive though. whoever thought up putting an 8 gig ssd
in there should be slapped upside the head.