The Miro 2.5 release had a couple of issues that affected users with large databases. We've been working on those issues and helping those people out for the last couple of days. This work culminated in a Miro 2.5.1 release.
Because I was working out issues with Miro 2.5 release and helping users work through issues (more on that in a future blog post), I haven't worked on the Ubuntu packaging yet. My current plan is to wait until Sunday (tomorrow) and do packages for Miro 2.5.1 skipping 2.5.
I apologize for not getting packages out sooner, but I:
was busy fixing Miro 2.5 issues and helping users
thought it'd be better to hold off until the Miro 2.5 issues were worked out
discovered World of Warcraft
If for some reason I can't/don't push out packages on Sunday, I promise I will do them as soon as I can. I use Ubuntu, too, so this affects me as well as all of you.
If for some reason this isn't satisfactory and you want/need it sooner than I can provide, I encourage you to build your own Miro from source. There are instructions here.