I have a 60gig BC PS3, so my questions are:

Can I play PS2 online games like 'Star Wars BattleFront 2' Online using the PS3?

and if so, how?

I asked the same question to someone else once.  I was trying to find the thread I read it in.  

a list of online ps2 games
http://en.wikipedia.org/wiki/List_of_PlayStation_2_network_games
starwars battlefront 2 is still supported according to wiki.


the answers in here:
http://boardsus.playstation.com/t5/PlayStation-Network/Exactly-How-to-Play-PS2-Games-Online-via-PS3/m-p/26714604

try to establish the connection apparently then, you hit the ps button and set it up like you assign a memory card

My friend play Battlefront 2 online so i know its still up and running. I always wondered if the PS3 could play PS2 games online so i guess this kind of answers it.

is that games servers are up then yes

its same like you play your PS2 gams online from a PS2

most old game servers get taken down after 1-2 years

if servers are taken down then you can play it with somebody through lan play using ip address but that option is only available in some games