Maybe I could hang some flyers up in the bars that they tend to congregate at.
Excellent Idea!! Likewise the website is a good idea as it gives you someplace to send them for more information. There you can direct them to other sites of similar interest, see the G-Sources page linked above for ideas. And, to MowBetter for more information on building them.
If you have any electronic classfieds in the area, pop an ad up on those as well. That will gain exposure for you very quickly also. Get the site set up first however, so you can direct them to the site.
If you run across any car shows locally, get the mower entered and man the booth. Works better if you have a couple of you there so you can sneak away to eat and take care of nature calls. Have business cards and flyers made up to hand out to every one.
Make the local parades!!
Find the nearest club, join and tell them you would appreciate some help getting things off the ground. If you can line up racers, get permission to use the runaway and hold an event. Advertise as much as you can afford. Flyers in bars, grocery stores, any place you can find a bulletin board that will let you hang a flyer!!
It's all about exposure, you have to be seen to get the message out. It's a tough row to hoe, when you're the only too, it makes it about impossible to be seen when you're all alone, but if you make a enough noise and make a big enough presence it will happen.