Wow! I never thought I'd receive so many thoughtful answers. We have a metal folding table that we'll bolt a locked donation jar to it, and empty it out and take it to the bank after each workshop. We'll also use a receipt book, which is useful for accounting anyway, and we'll try to incorporate donation requests into our receipts.
In response to DancesWithCars, we have business cards and t-shirts on the way (we traded a bike to a screenprinter friend for the shirts!), both hopefully this week once we meet up with our designer friends to work on our logo. We also have a website that helps to vouch for our credibility, with more pictures and a redesign soon, and once we start distributing bikes to established nonprofits, our relationship with them should help as well. We'll also have our 501c3 applied for soon.
If anyone else has other ideas on how we can look good and prove our legitimacy, I'm all ears :)
Thank you!
Ryan Feller, Co-Director Bike Broward (954) 232-3790 www.bikebroward.org