Anybody else get back into the Serps again recently?

One site of mine that had been "lost" now found again

[androidtech]

Has anybody else seen any of their sites jump back into the SERPs again?

I had one site that dropped off the first 30 (yep 30) pages of SERPs many months ago, after being on the first page for several months for the "good keywords". It's pages were still in the index, but obviously some penalty knocked it out of the general SERPs.

About a few days ago it just reappeared again. I've stopped tweaking sites when drop-offs occur; instead I just keep adding content with blinders on. Trying to figure out what Google is up to just doesn't seem like a good way to stay sane.

So has anybody else seen this? I think there may have been another algo tweak at GHQ.

Thanks.