2. To keep the window to have a scroll bar the size of a chickpea
3. I don't know Posterous enough. Usually, you read Post A tagged with tag A', click on A' and you can read more posts tagged with A'
4. It's ok. Cool, even
5. Even with broadband, it took a while to open the blog. Cut down the number of entries. If you want someone to know who you are, you need to get visits, somehow. If you offer interesting content but noone reads it, you have failed!
Once you realise that, the rest does not require that much time. For example, if you use to read other people's blogs, just drop a comment in interesting posts, with a link back to your latest post (your comment - greetings - who you are and a link to your latest post, labeled as such). This way, you spread the word of what you talk about without requiring any more time than starting a conversation in some topic that did interest you. Maybe you even had a post (HN comment) related to the post you read, fine, link to it, saying so.
Your blog looks too disorganized. Untagged posts make for "non index stuff". If I want to read more about your ideas on startups I have no real way to do that. You could also add some 'personal' information in your posterous profile: who you are and what you do are fundamental.
Cheers,
Ruben Latest at my blog: 4 Reasons Why Pacman Is a Metaphor for Blogging (http://www.mostlymaths.net/2010/09/4-reasons-why-pacman-is-m...)
Just as a sample ;)