I've been using Serpfox, it seems to work quite well. You can track up to 10 keywords for free I believe, and you can set rules for notifications upon certain changes.
You already have an account on the biggest one in the world... http://tools.digitalpoint.com/tracker.php
AllSubmitter, 3 projects with unlimited amount of key words and all possibilities of the module will be checked absolutely free.
It should be fairly quick since Google upgraded their API servers. What sort of timeframe are you seeing? I see everything I'm tracking updated in less than a minute (maybe a hundred or so).
PRchecker is best tools for check Google Page Rank. Also, PRchecker is free tool to use and easy understanding steps. This tool provide show your visitors the current page rank of your web pages.