There are a ton of places out there to check your PageRank. But a cool tool is PageRankr.

Most page ranking sites you just insert your URL and you get a read out of your Google PagRank. But at PageRankr not only do you get a Google PR from it, you also get your Alexa ranking, if your URL is DMOZ listed as well as backlinks in the top 3 Search Engines(Google, MSN and Yahoo). It also tells you how many indexed pages you have for your URL as well.