Hi Dave,
First an answer on your first question. If blobs (datatypes byte or text) are stored in blobpages they are NOT logged in the logical log. Or actually the LOB itself is not, but the pointers are. A copy of the LOB is saved in the blobspace as long as necessary. If you are using blobpages inside dbspaces then they are lgged just as normal pages.
Your second question is somewhat harder to answer. I think we need extra info like the version of your database, the kind of replication you are refering to (HDR/ER) etc.
Hope this helps,
Rob Prop