*is, apparently, not interesting due to lack of Dr Who forum locations*
I read a lot of interesting speculation on the Digital Spy forum, though. However, I am not a fan of that board so much because it does seem to just rip people apart if they feel like it.
As for the bug-people...Yikes...Russel T. Davis said that it would complicate the script if they escaped back to Earth, so they had to die...Poor things! Doomed to death with a flick of the script-writer's pencil...Also! Did you know that originally the Bus in the special was supposed to still look basically new in the dessert, but the top got entirely crushed during transport, so they had to adjust the script to match!
As for Dr Who in general, I started watching it because ...er...because...um...*ashamed*... Because Catherine Tate joined the cast, and I am a huge fan of hers. After watching one episode, however, I was 100% hooked on the whole Who-verse and have watched almost every episode (of the new series's) since. I did like Rose, but never really got the point of Martha.