On the backup issue, I had better luck. There are various options for (essentially) spidering the site and storing pages, including the ScrapBook extension for Firefox (which I already use for other purposes). In my case, I found a simpler option. The key is that I already have source documents for any images I use (because I have to create them myself). For lengthier posts, particularly those with lots of math, I sometimes compose the post in LyX and transfer it to Blogger, which means the LyX document serves as a backup. So my main need is to back up just the text itself (with or without all the extra clutter), primarily for the posts that I create directly in Blogger's editor (such as this one).
Enter the DownThemAll! extension for Firefox. Once you've installed it, the process is pretty simple:
- In the Blogger dashboard, select Posting > Edit Posts and list all your posts (or all your recent posts if you've backed up the older ones). There's a limit of something like 300 posts on any one page, so if you're very prolific, you'll need to iterate a few times. (Then again, if you're that prolific, you obviously have no shortage of idle time.)
- While staring at the list of your posts (each post title being a link to view the corresponding entry), click Tools > DownThemAll! Tools > DownThemAll! in Firefox to open the a dialog in which you can select the files to download. Highlight the ones that say "View" in the description field. A quick filter on "*.html" selects them all without (so far at least) grabbing anything else.
- Select where to save them, futz with other settings if you wish, then click Start! and watch DownThemAll! suck down all your postings.
If there's a better way to do this (and particularly if there's a simply way to print just what's in the actual post), I'd love to hear it.