So, how much does everyone pay (per minute) to call back home (wherever that may be) from Samui.

And what method do you use?

Not Samui, Bangkok, but 6bt with a phonenet card from CAT.

Your own landline dial 009, 008 or 007 (before the country code) and it is 7 baht a minute to the US, the UK and most of Europe (not Ireland tho) . Also available on a mobile phone with a Thai SIM card. Be aware that you won't get this rate on someone's private phone as that person is charging you extra for the use of their phone. Also available a CAT Phone card usable on payphones, 009 gets you 7 baht a minute.

$20 a month for unlimited calls to USA and Canada.

Vonage.

Its good

Must have DSL for Vonage tho, correct?

That is correct.

Worked great in Bangkok, and Im hoping my dsl here in samui will be good enough as well. Sattelitte has too much lag for good VOIP.

Skype call australia .3BHT( That is point three baht) per minute ,must have ADSL.