ELH contained a small adventure involving the City of Brass
iirc.
If you want epic NPCs, monsters, deity statblocks, revised deity rules, an integration of divine and epic rules and tons of expertise on running epic and epic world building, I suggest you check out the
Dicefreaks boards. They also have published the excellent
Gates of Hell pdf.
Now for some Greyhawk goodness:
Check out the excellent
Oerth Journal #22 for a low epic Greyhawk adventure set in the the Coldwood. Originally this adventure seed appeared in the unpublished 2E Greyhawk accessory
Ivid the Undying. (Some of the Greyhawk NPCs from that 2E book got updated
here..)
The issues 23 and 24 of Oerth Journal also contain adventures: #23 a new Maure Castle level by Rob Kuntz himself, and 24 another low epic adventure developed from material in Ivid the Undying.
OJ22 also has details on the Great Cataclysm in Greyhawk including an epic spell. As supplementary reading for that i recommend
Maldin's Epic Mysteries site, where among other things he describes an epic time-travelling campaign where his PCs caused the Invoked Devastation from Oerth Ancient History. Great stuff. His site also has details about the Codex of Infinite Planes artifact.
Also check out the
EpicHawk forums on canonfire.com for an
Epic Isle of the Ape conversions.