Some more recent Lightning-related talks/discussions:
T-Bast of Phoenix wallet
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Lightning Splicing w/Dusty
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Evan of Zeus wallet
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Zucco of PlanB with Roy Sheinfeld of Breez, Marco Argentieri of Ark, Federico Tenga of Bitfinex (RGB rep), Kilian Rausch of Boltz
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Veronika Kuett of Ark, Roy of Breez and Jesse of Amboss
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Routing on Lightning with Rene Pickhardt
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Veronika Kuett of Ark Labs with Erik De Smedt of Second (Bark), T-Bast of ACINQ and René Pickhardt, Lightning researcher