State approvals announced Friday all but guarantee that several Atlantic City casinos will be prepared to offer online gambling by the Nov. 26 launch. The New Jersey Division of Gaming Enforcement released a list of companies that have been awarded waivers, authorizing them to engage in Internet gambling activities later this month. A trial period begins Nov. 21. The waivers indicate that the companies have submitted complete applications and have passed preliminary investigations. A license will still be needed to operate in New Jersey in the long term, according to state guidelines. The casino entities offering Internet gambling also have…