So you're too cheap (practical) to buy a data plan for your phone or you left it at home and all you have is your partner's?  Try this link for handy online utilities to use with texting!  (NOTE: while some plans come with unlimiting text, most come with a predefined or no texting and to upgrade or going over your number of text messages will cost!)

http://www.computerworld.com/action/article.do?command=viewArticleBasic&articleId=9079840&pageNumber=2

Also, check out the authors blog on CNET: VERY nice; its going in our favorites!

http://www.cnet.com/cheapskate/