Tony Vargas
Legend
So, Kyuss, himself, is in Open Grave, and Elder Evils and Dragon 370 have additional members of the Kyuss family of horrors.
When doing conversions, I like to find the 4e versions of the monsters, first, then mess around with the levels, maybe re-organize things, to present appropriate challenges through the arc.
I don't remember much about Age of Worms - IIRC, it's familiar from a story hour on here, back when it was new - so IDR if it had much in the way of traditional dungeon crawls with lots of little encounters & wandering monsters &c, but, when converting those to 4e, a Skill Challenge and/or linking together the seemingly pointless little encounters into waves of a single encounter, can be a good way of adapting them. Aside from that, modules convert pretty smoothly, since 4e is more flexible in the range & pacing of challenges it can handle without showing cracks than other editions, and, whether you convert an encounter and calculate it's challenge, or tune it to match a level you want, the results are comparatively dependable.
When doing conversions, I like to find the 4e versions of the monsters, first, then mess around with the levels, maybe re-organize things, to present appropriate challenges through the arc.
I don't remember much about Age of Worms - IIRC, it's familiar from a story hour on here, back when it was new - so IDR if it had much in the way of traditional dungeon crawls with lots of little encounters & wandering monsters &c, but, when converting those to 4e, a Skill Challenge and/or linking together the seemingly pointless little encounters into waves of a single encounter, can be a good way of adapting them. Aside from that, modules convert pretty smoothly, since 4e is more flexible in the range & pacing of challenges it can handle without showing cracks than other editions, and, whether you convert an encounter and calculate it's challenge, or tune it to match a level you want, the results are comparatively dependable.