I think its's still going to be a while before we see BSG series 2.
The various two packs (Apollo and Dee/Eight and Three) are not due out until September/October and I would expect the "main" series 2 (Starbuck, Helo and Cylon) to be released at about the same time.
DST have been pretty slack when it comes to updates on BSG (and SG/SGA) lately. I realise they ran into a fair bit of trouble trying to find sponsors for the various "exclusives" for series 2 (hence the multiple two-packs), but I don't see why that should have necessarily delayed the "main" series 2 which was originally set for release in February 2008.
And absolutely no idea about series 3, although to be honest it doesn't interest me in the slightest and I still cannot fathom how DST can be releasing a young Adama Snr figure (Husker) before we get a "true" Admiral Adama figure. Not to mention the fact they're also releasing a figure of Kendra Shaw who was enjoyable enough, but only appeared in Razor and hasn't been seen or mentioned since.
God. That's all very depressing and probably spot on.
I'll be getting the Kendra figure but yeah, that's it for me from series 3.
And I don't get mad about stuff having to do with toys very often (disappointed or bummed out, sure) but I am actually mad about them releasing young Adama first...that really just blows my mind.