If your paranoid and don’t want to install the google toolbar – or seoforfirefox.  Here are some other places to check page rank……. or if you want to see your future PR:
Rank Checker (Ranking Tool) – Get a overview of your website’s ranking
PageRank Lookup (PageRank Lookup – SEO Tools – Search Engine Optimization, Google Optimization) – check the PageRank for a website
Google PageRank Prediction (PageRank Prediction – Predict Page Rank Predictor) – check predicted PR of a site
Multi-Rank Checker (Rank Checker) – View your Google PageRank and Alexa Ranking in bulk
PageRank Checker (PageRank Checker – Check Your Google Page Rank) – View your Google PageRank on differnet Google servers

Feel free to add other PR resources in the comments here.