The Washington Post has a good story on the GOP's inability to recruit strong Senate candidates. Much of this is already known, but the really interesting information is on fundraising:
It is the NRSC's fundraising that some GOP operatives find underwhelming. At the end of August, the NRSC had raised $25 million, just a little less than its counterpart, the Democratic Senatorial Campaign Committee. But the DSCC has twice as much cash on hand, $16.7 million to the NRSC's $8.2 million.
Looking at the fundraising comparisons from the last midterm cycle (2002), the NRSC raised $73 million to $60 million for the DSCC. Of course, the fundraising cycle is only beginning, so these numbers may well change.