Thank you! That would be a wonderful relief. One of our sites has 110 pages available for indexing, but only 18 pages are likely to change - the rest are static information pages or product pages which don't normally change once they've been posted. Crawling those once per month would be quite sufficient for freshness.
In the first 14 days of this month the Yahoo! Slurp bot has requested 737 pages and robots.txt 449 times - roughly 32 times per day. This is really taking freshness to the extreme! Compare Slurp figures with Googlebot, which in the same period has requested 172 pages and robots.txt 16 times - slightly more than once per day. I am perfectly happy with the freshness of our results in Google.
Does Slurp take any notice of the "revisit-after" metatag?
<meta name="revisit-after" content="30 days">
If it does, I'd be more than happy to use it.