Running the Greyhawk Classic campaign of Temple of Elemental Evil, followed by Scourge of the Slave Lords, and then Queen of Spiders. I figure that should take us from Lv 3-17, and work well as an epic. If needed, I'll throw in White Plume Mountain, Lost Caverns of Tsojcanth, Forgotten Temple of Thrazdun, and/or (of course) Tomb of Horrors. Trying to play up the Sword and Sorcery aspect of Greyhawk, and it's working out pretty well.
I'm playing in a FR campaign that started with Ghost of Dragonspear, modified to occur during the Sundering and after Murder in Baldur's Gate. We finished 3/4 of it, but split off because: there's a time gap between adventure 3 and 4, and we're too low level for adventure 4. We faced down a troll-fire genasi (his father was an Efreet Lord in the City of Brass) who had rallied various humanoids along the Trade Way. We're currently dabbling in politics in Baldur's Gate while waiting for information on the location of a shrine that a Yaun-ti plans to use to open a Gate to the Abyss (she's a demon worshiper). Really fun game with a mix of exploration, hack & slash, and social interaction (especially when we inadvertently allied with Zentil Keep!). I'm playing a Moon Elf Rouge/Arcane Trickster who's a Moonstar agent.
I'm also playing in a Ravenloft/Dark Sun game that started in 4E. It was a Dark Sun game that had us kill the Dragon. Afterwards, the surviving Sorcerer-Kings told us of Rajat, and his probable return with the death of the Dragon. They sent us back in time to stop him during the Cleansing Wars, where we switched to 2E. We rallied the various races to fight off the Champions, and faced Rajat in the Pristine Tower. There he was consumed by the mists of Ravenloft, and we were all sucked into a new Domain with Rajat as it's lord, where we switched to 5E. We are now living in a version of modern day Tyr, with the City States ruled by mortals, but Rajat and his loyal Champions still lurk. It's been a long mega-campaign that's spanned about 50 levels (half in 4E, 20 in 2E, and the rest in 5E), but it's been pretty fun. I'm playing an Eladrin Oath of the Ancients Paladin who's actually a reborn Pyreen (from the 4E Epic Destiny). The campaign has been mostly war-based, with us serving as an elite fighting force, but has had some subterfuge and politics as well.