Eh, it'll happen eventually. But, he is starting to sit really well, and in that regard he seems to be the same as Norah at this age: She too didn't seem eager to roll over and she actually sat pretty well before moving on to rolling over.
As for me, post-baby, I sometimes feel dispapointed that my running isn't where it was post-Norah. At this time after her birth, I was back to running HM distances, but right now, the longest run I've put in the books is a 6 miler. I am running on a regular basis, but I feel as though it's so much slower and shorter than it was post-Norah.
I know I can't be too hard on myself since adjusting to 2 kids has literally meant TWICE the work (who knew, right?!) as adjusting to having 1, and I often feel as though I'm just "scraping by" with my running. Which, as I thought about it during today's run, is fine. I'm staying in shape, keeping extra weight off, and getting enough exercise in that I don't feel like a caged border collie. And, for now, I think I have to be satisfied with that level of my running.
Yes, I wish I were running more, but I know my running will keep, whereas, babies don't -- in the blink of an eye that little dude is gonna be ignoring me one minute and sassing me the next. Best to not run too far from him right now. :)