BurninMan921 wrote:A) Cost
B) Service interuptions/failures (modem's always resetting in the middle of the downloads).
C) Crappy newsgroup service
What kind of newsgroup service do you want? If you're interested in binaries *grumble* you might as well head on over to giganews.com. If you want straigt text newsgroups for discussion like they were designed for check out news.individual.net which is very complete and up to date, or supernews.com. Andrew at supernews frequents several of the groups that I post in and their service is very solid and complete.
As for DSL service itself:
1) Depending on location, generally, speeds are not as fast as cable, but you don't run into node saturation problems due to a single source of bandwidth right to your ISP. This also influences packet loss and over all response times on the line. So basically it's slower in most instances but somewhat more reliable.
2) From what I've observed, people have less trouble with DSL routers/modems than they do DOCSIS based cable modems.
3) You're less prone to port scans and intrusion attempts due to being on a different non contiguous 188.8.131.52/8 IP space.
I haven't used DSL service from verizon before, but I have used IDSL(northpoint, rhythms, covad), ADSL(qwest), cable (formerly attbi), and currently wireless. There's a rather large verizon forum at http://www.broadbandreports.com