Hey all. Not from Australia, but noticed the thread and thought I'd chime in.
Personally, I love Signature at MGM. It's a condo-type resort, and is non-smoking, non-gambling.
It's a bit off strip, but is connected by walkways to MGM, which is huge (and has tons of restaurants), and it's fairly easy to get from the walkways, through the casino and to the strip.
Sig is very much a luxury property (and is consistently rated #2 on Trip Advisor), but you can usually get it for pretty close to the same price as MGM (I've actually gotten it for less before), and runs around $129/night for a studio (can be as low as $90) or $179 for a 1-Br (can be as low as $129). Not sure if this is in your price range or not...
Also, a lot of people remember the Vegas of the 90's that was trying to revamp itself as 'family friendly.' Those days are gone. You can still take families there, and there is stuff to do (Cirque shows for one), but as people have already mentioned, it's not 'Disney' friendly.
The 'porn slappers' as they have been dubbed (referenced earlier as 'spruikers') don't actually work for strip clubs. The cards they hand you have phone numbers on them, and they're essentially handing out cards for prostitutes. Note that there is no true nudity on them (as there's a tiny bit of pixilation over nipples), but they're all over the ground, and looking at them while walking, the girls look *very* naked. Now and then you might also see a moving bilboard drive by with one of these cards blown up on it.
I don't want to discourage you from going, but you need to realize Vegas really doesn't try to be family friendly anymore (but lots of families do go, and have a great time). Check out these links for info on Vegas with families.
http://www.tripadvisor.ca/ShowTopic...king_Your_Kids_to_Vegas-Las_Vegas_Nevada.html
http://www.tripadvisor.ca/ShowTopic...our_Family_in_Las_Vegas-Las_Vegas_Nevada.html