Magento CE 1.9.2 has been released
Update: Today 7th of July, 2015 Magento CE 1.9.2 has been released: https://www.magentocommerce.com/download
Magento Community Edition 1.9.2 includes SUPEE-5344, SUPEE-5994, and the also today released SUPEE-6285 patch.
FIRST ANSWER (May 8):
I have contacted Magento through the Partner Portal support panel (thanks for the hint!) and I have received an answer. It is clear, but not exact and not satisfying ;)
Here's some quotations from in between the formal and slick support style answer.
"there's no definite date yet for the release of Magento Community 1.9.2"
"[The] response from the Product Manager regarding the possible release date":
"they are still discussing options for the date but June is the soonest possible release month since there are still some security fixes and performance improvements they need to implement. It is still not definite and it might still change"
So in short:
"it [the release] is still being a few months off"
UPDATE (May 19):
"The Product Manager [said that the] target for the release date is end of May or early June. They had to push the security updates [SUPEE-5994 patch] first as this was more critical."
UPDATE (June 8):
"[...] due to the recent security issue, the tentative expected date was moved to July around the 9th"
In my own activity here on Magento SE and in my search for an answer, I stumbled upon this question "Shoplift vulnerability if admin panel is hidden? " which's answers refer to a MageHero blog post about renaming the Magento admin URL. In the comments on the post, different persons are referring to the fact that the admin URL, although changed, can still be discovered in multiple ways. Ben Marks responds on May 4th "This issue is currently being patched."
Probably this is one thing they want to have fixed before releasing anything and that it is one of the issues that has pushed the release from "in the next few weeks" to "a few months"
UPDATE (May 15): The patch SUPEE-5994 was released. These are a bunch of security fixes that will be already included in Magento CE 1.9.2.
UPDATE (July 7): Magento CE 1.9.2 has finally been released and along side of it a security patch SUPEE-6285 was released. This patch is already included in Magento CE 1.9.2.