For you lonely souls out there, eHarmony is doing a promotion this weekend. Among all dating sites this is the one I would trust (not that I need their services but still :-)).
Here are details from the email they are sending out:
If you’ve been waiting for the right time to give eHarmony a try, this is it.
Friday through Sunday is our Free Comm™ Weekend!
For three full days you’ll be able to communicate with everyone we match you with for free! No credit card required and no strings attached! But we can’t start matching you until you complete your questionnaire, so we encourage you to take a few minutes now to finish it up.
Don’t miss this amazing opportunity to give eHarmony a try!
Thanks to the diligent folks at SlickDeals forums for finding this deal.
Update: If you are serious about giving it a try read the “consumer complaints” section of this Wikipedia article. Before you can use the service you will have to fill out a 30 minutes personality profile and your acceptance IS NOT guaranteed. Nevertheless I personally consider this agency as one of the best.