At the moment there is no spell check, however this issue can be easily overcome by switching over to Fire Fox. It is a web browser that I have been using for the last 2 years and comes with a live spell check built in for use on any web page. http://www.mozilla.com/en-US/firefox/
I 2nd the Firefox recommendation. Spellchecker is nice and a little add-on called adlblock plus is great as well for removing those pesky ads on websites.
I also recommend FireFox. I then will cut and paste any misspelled words that are underlined and enter them into Google and 90% of the time I get the correct spelling along with the definition.
Just click on the word it shows the correct spelling for you. Just make sure you have the latest edition so that you have the most up to date dictionary.