At your current posting rate, the current default of 5 looks fine. (I also used Firefox/Sage, so I can't contribute on that end).
I notice that the RSS shows a short description, rather than an excerpt or the full post. So when you post, do you write out the post then write out a summary (for the RSS)?
So now, the feed doesn't reflect comments here at all, but the comment threads are the good stuff. What would people suggest? I could make a second feed to compile comments according to some scheme or other. One entry per five comments, one entry per ten comments, something like that.
I don't know how hard this would be, but how about:
* One RSS feed listing threads (what you have now).
* One RSS feed for each thread, listing comments. Folk can subscribe to the ones they're interested in.
Thanks for putting up an RSS feed. You have made me a very happy camper. I'll be testing it through Bloglines over the next few days and let you know if I run across any problems.
Thanks for the RSS feed. I'd agree with what Sben wrote - one main RSS feed for the main blog, and then a seperate one per thread to which we can subscribe if we wish.
As for the number of posts... I'd say 5 (or more) is a good number. Only the most recent post would be bad; people would be sure to miss out on some of your posts!
But having to keep the RSS feed updated manually is a bit of chore, don't you think?
Another option, less work: Two feeds, one for articles (which you have), one for the last couple dozen comments (a longer version of the front page's "Newest Comments").
A couple comments -- I note the content-type header of the feed is text/html, it should be text/xml
Viewing the feed in NetNewsWire, embedded HTML (like links) is getting rendered as the literal markup rather than being interpreted. I peeked at the raw feed and I notice that the significant stuff is getting escape as character entities. I don't know enough RSS fu to know if this is a good thing or not, but I compared with Clinton's feed and I noticed that there the HTML content is in CDATA blocks, and it seems work much better
Please please please put full article text in the feed. Feeds that have summaries are annoying because you can't read them off line!
The full articles still read fine. The comment articles read fine... except they're titled "2007: Vincent at 2005-07-26 14:44:40" and the like, If you were trying to subhead it with the post title, you've got a little further to go.