The first Starknet Appchain has officially gone live, marking a significant milestone in the blockchain community. This development was announced by various sources, including the creators and supporters of the project. The Starknet Appchain, praised by EliBenSasson and developed by @tradeparadigm, is now in Open Beta and has been launched on the mainnet, as confirmed by StarkWareLtd, with celebrations indicated by emojis 🎉🥳. Additionally, the Starknet token is set to begin trading on exchanges today, indicating a new phase of accessibility and potential growth for the project. This series of events underscores the rapid progression and enthusiasm surrounding the Starknet ecosystem, particularly in the decentralized finance (DeFi) sector, as suggested by a tweet hinting at a 'Starknet DeFi Spring.'