A great article by Thanissaro Bhikkhu about Dāna:http://www.accesstoinsight.org/lib/authors/thanissaro/nostringsattached.html
Coming from Sri Lanka, I can really relate to what he is saying. Even though the practice of meditation has stagnated and rites & rituals have taken hold in Sri Lanka, one thing that thankfully still lasts there is a culture of generosity. Now, living in the West, it's one of the obvious things that I see missing. Retreats and talks almost always include a fee or a "suggested" donation, and there is a dāna talk at the end on how you "should" be generous.
Dhamma books are mostly sold (although that is not just a western practice) and very rarely offered freely. I find it particularly surprising that most of the "non-profits" that distribute core books don't do it freely - especially considering how easy it is to do now with the internet. The entire Tipitaka in Sinhalese script and translation is available online (http://aathaapi.net/Thripitaka.html
) - something that can't be said of the English translations that are protected by copyright.