Mostly webcomics and a few Dreamwidth pages.
a_random_fox
I also recommend them, they are great. Some things that i especially like is the connection between the two main characters, the books giving you a very believable idea on how dragon-based warfare could work and showing different ways various cultures interact with dragons. While the major european powers mostly stick to the air force part mentioned in my earlier comment and generally don't interact with people outside the military much, china for example has dragons more integrated into society and holding a wider variety of jobs. Book 4 showed a lot about dragons in southern africa, though i won't spoil the specifics.
I have completed book 4 since my previous comment and am now deep into book 5.
I am currently about halfway through the fourth book of the Temeraire series by Naomi Novik. A sort of historical fantasy set in a version of the Napoleonic wars in a world with dragons, which are used by the nations of that world as a sort of airforce. This one in particular is about a disease threatening the british dragons and the search for a cure.
The romulan attempt was in S5E24 "The next phase" so it was before "Pegasus" which is in season 7
Yes, Relay. Not nearly as much as before the whole API situation, but i still use it occasionally.
In German it is called "Das nächste Jahrhundert" meaning "The next century", which avoids that issue.