The temptation to weasel is a large part of why I keep my pledges capped. Because as soon as you start down that slippery slope, you’ve broken Beeminder as a tool.
You could run a lot of things through your public twitter account, and use the tweets to update Beeminder. There’s our own twitter integration for simple hashtag counting, or our IFTTT integration that lets you use macros to include numeric values.
At least that raises the possibility of a friend saying that they don’t think you actually read 50 pages of War and Peace because they were in the pub with you all day yesterday…