I'd always read that Obama was relying more on small donors.  Unfortunately, given the fact that Sen. Clinton has not released her contribution total yet for March, I can only provide partial numbers.  

The first number is for Pennsylvania, where Sen. Clinton's average contribution is $486, compared to the "relatively small" average of $279 for Sen. Obama (quoting the article).

http://www.mcall.com/news/local/all-a1_5 money.6335296mar30,0,4042657,full.story

Sen. Clinton's average donation in February nationwide was $100, and that was down from previous months as the campaign adopted a "smaller but more" strategy as opposed to the "pay attention to the big givers" strategy.  

http://blogs.telegraph.co.uk/foreign/tra ilmix/feb08/hillaryclintonscampaign.htm

This fact can also be seen in the breakdown of donors by amount they gave, as seen at opensecrets.  

http://opensecrets.org/pres08/donordems. asp?filter=A&sortby=S

Here is the basic breakdown by percentage of dollars raised:

From donations of less than $200:
Obama- 40% of total raised
Clinton 23% of total raised

$2300 to $4600
Obama- 32% of total raised
Clinton- 51% of total raised

$4600
Obama- 6% of total raised
Clinton- 24% of total raised

In summary, 75% of the money Clinton has raised has come from donations of $2300 or more.  Obama, by contrast, has only raised 40% of money that way.  40% of his fundraising has come from donations of less than $200, compared to only 23% of Clinton's fundraising.  

I'm not sure what else to add, except that I don't think anyone here is surprised by this information.  In the future, I hope that any diary discussing an issue doesn't just do research on one candidate and then say "and my candidate doesn't do that."