As per your demand and suggestions to have a way to contribute money online, we now have a widget to contribute money online. The widget is on the right side of the blog and looks like this.
Using this widget not only can you contribute money but also track the progess of funds raised so far.
To pay just click the button titled "ChipIn!", on clicking it you'll be taken to the next screen where you can specify the contribution details. You can pay via credit card and paypal.
Just give this widget a try and see how it works :)