The two things I took away from the webisodes:

1) We now know what Baltar said to Gaeta to make him stab Baltar in the neck with a pen, though it was kind of underwhelming. ("I know what your Eight did!")

2) While the fleet has allied with the rebel Cylons, and the four Cylons within the fleet are tolerated (Tigh's still on duty), the experience with the Eight on board the Raptor has led Gaeta to believe that no Cylon can be trusted ("I need to speak to Adama directly." "Why?" "Because you're a Cylon.") and he's going to do something to stop them (or something to that effect).

All in all, not entirely necessary - it appears to just be set-up for something Gaeta's going to do, the way "The Resistance" was meant to get you emotionally invested in Jammer and Duck's characters while setting up their roles in the beginning of season 3 (suicide bombing, the New Caprica Police thing). I thought they were engaging, though - not sure why everyone seems to think they were dull.

And I agree about Tyrol, I lost interest in him after New Caprica, to be honest. I think he should have died on New Caprica during "Exodus," and Cally should have been a Cylon, but then again, she became very annoying after New Caprica. They should just never have gotten together at all, IMO - I think that was what made their characters uninteresting/annoying.