Anna - there is a discussion that was started last year - Grants for educators that has lots of grant ideas for teachers to apply for various grants to help with classroom funding. Although some of the deadlines have passed many of these are annual grants - so you might want to see if any are a good fit for you and your classroom for 2012.
In addition if you are looking for specific technology- you might share what technology you are looking for and ask others if they found away to acquire that technology.
Good luck to you and your classroom.
1. Try local credit unions in your area....around here they are eager to help out teachers.
2. Or you could try Sonic's program--http://www.limeadesforlearning.com/ which is similar to donorschoose.org
3. Or you could look into Target's program, where schools sign up to get funding with each transaction a customer has.
Just some ideas