I had a talk with Jan Peca (aka theBoxer) about this problem this very morning. For simplicities sake, I'll just paste the whole chat into this post:
Hint: read the FULL conversation. There are some really important things you should know about.
[10:45:54] pepebe: Hi, long time no "see". Did you know about this:
http://forums.modx.com/thread/91922/is-collections-the-new-articles#dis-post-502241
[10:47:24] pepebe: I can neither confirm nor deny this, because I don't have 2.3 running with collections. Thought you would like to know about it.
[10:47:45] Jan Peca: Hello
[10:47:59] Jan Peca: I know about that, in github is version 2.0.0 alpha which works with 2.3
[10:48:53] pepebe: Any chance to can get this into the repo before the anticipated/dreaded 2.3 arrives?
[10:50:24] Jan Peca: I can't submit it now, because I can't select minimum version 2.3
[10:50:33] Jan Peca: and 2.0.0 is not compatible with modx 2.2.x
[10:50:53] Jan Peca: due to change in modx 2.3 connectors
[10:53:07] pepebe: So, what happens if I upgrade from 2.2.x to 2.3? Will there be two versions of collections in the wild? I can imagine that a lot of people will be reluctant to upgrade immediatly.
[10:53:22] Jan Peca: no
[10:55:31] Jan Peca: you should see just the 2.0.0 version from modx 2.3 when it will be in repo
[10:55:52] Jan Peca: I am changing all collections releases in package repo to be supported only up to revo 2.2.
[10:58:08] pepebe: So there will be one version for each release available (<2.3 and =>2.3)?
[10:58:47] Jan Peca: yes
[11:00:10] pepebe: Great. Do you mind If I share this information on the forum, or do you want to write a few lines yourself. I guess this is important for a lot of people.
[11:00:25] Jan Peca: fell free to write it there
[11:00:47] Jan Peca: also here is the link for 2.0.0 if anyone want to try it with 2.3 now
[11:00:47] Jan Peca:
https://github.com/modxcms/Collections/blob/develop/_packages/collections-2.0.0-alpha.transport.zip
[11:01:07] pepebe: For simplicity. Do you Mind if I just copy and paste our conversation?
[11:01:41] Jan Peca: do whatever you think will be the best
[11:02:48] Jan Peca: and keep in mind that it's just alpha it has just the support for 2.3 it might change within the pl
Cheers,
pepebe