I WOULD have preferred this title: "Why I did not lose an arm and a leg in sending a 1.8-MB email." But it was just too long.
Anyways, Neerav Modi's response came in very quickly, and it was very enlightening.
Just so you and your readers know: You didn't get charged for forwarding a 1.8MB attachment because the file itself did not pass through your phone's network (if it did, you would have been actually charged for 1.8MB twice!). One of the beauties of Gmail compared to other email services -- you don't have to download the attachment and then upload it again when sending/forwarding. It's also one of the reasons that make Gmail and gmail-mobile so fast.If you are a cellphone-owning Gmail user, and you are not using Neerav's service just yet, I think it's time you do.:)
gmail-mobile simply takes advantage of that and many other neat Gmail features.
So, use gmail-mobile and forward all you like. Don't neglect to take advantage of all the other features not found anywhere else, too. ;-) More features and improvements are also in the works like gmail-mobile on PC browsers (oops, did I just say that?). And onwards to the 200,000 user milestone! Only 20 more months to go...