I've created two (separate, but equal) docs -- one in Excel, one in OpenOffice -- for a complete SIERA list, including pitchers who pitched 25 innings or more. You can download these from my Google Docs, here:
Excel SIERA Test
OpenOffice SIERA Test
For those just catching up, here is Day 1 and Day 3 (I was busy on Day 2 with my classes or looking at pictures of cats or something -- doesn't matter, nothing super significant happened).
I just ran a quick little regression or two in STATA. It looks like FIP and SIERA, as a whole, share correlation, but are indeed somewhat different. The chart below shows how they tend to fan out in the higher ranges: