That bundle thread.

[taytothief]

Will keys be released for buyers of Indie Royale Mixer 4? There's a product key atm, will we be able to get a Steam key though?

[coruun]

I got mine, too. :)

[K1lo]

Awesome

[Awesome!]

just want to say thanks for staying on top of this and getting it resolved

[K1lo]

Pleasure :-)

[harley9699]

Mine's (Steam key) still not on Desura.

[bar.pys]

Originally posted by harley9699:

Mine's (Steam key) still not on Desura.

Edited:
maybe write a support ticket to Desura?

[K1lo]

Hey harley9699! I'd go with what bar.pys suggests, every Desura account with an Isomer key should have a Steam key too. Give them a nudge and let me know what they say :)

[harley9699]

I did!...and they nudged me away: "Please remember that if you purchased the game from an outside website or as part of a bundle, you will not have a Steam key available on Desura. If that is the case, you can contact the game developer to see if they would be willing and able to provide you with a Steam key.

If you have any further questions, please let us know." Then I contacted you guys, no reply yet.

[bar.pys]

Yeah, what they did with Isomer is the first time i saw - the Steam keys are actually visible both on desura collection and the indieroyale collection page (all other games i know of were visible only on IR collection page, not Desura).I think you just got a response from a generic list of their knowledge base articles.
I'd contact them again if i were you (provide them with the link to this post) though Developper assistance might be helpful as well when speaking with Desura ppl.

[harley9699]

I'll try that because I don't have a Steam key on my Desura collection page.