DSL is usually made available by the local baby bell/phone company. (Verizon, SBC, Sprint, Bellsouth, etc) Some other companies may re-sell the dsl with their own label(long distance companies, AOL, etc), for a lower price, but the wiring is still provided by/serviced by the local phone company.
Alternatives likely in your area (with downstream speed in Megabits per second/Mbps)
Dialup - obsolete/slow/dedicated phone line
DSL - faster low priority (0.7-3.0) (10 in UK)
CABLEMODEM - faster mission critical (4.0-15.0)
FIOS - fastest unknown priority (5, 10, or 30) Basically, replacement for DSL. Not in all areas yet. Can do digital TV too.
Other (expensive) ways: T1, T3, ISDN, FRAME, WIRELESS, SATELLITE, etc
Business DSL, Cable, and FIOS generally start at about $50/month in most markets. (in comparison, the slowest 0.7 Mbps residential DSL starts at $14.95/mo. 5.0 Mbps cable here is $39.95/mo) The price and speeds offered vary by city, and they will always charge more for business customers.
When setting it up, I suggest asking for just a single IP address (cheapest plan) and using your own ROUTER to share the connection with the pc's in your shop. A router/nat firewall I suggest is the LinkSys WRT54G (on sale for $39 at Staples.com this week) Some DSL providers try to give you a USB device. Insist on one that has an ETHERNET port, if possible, so it will work with the router. Some others (Verizon, etc) will give you a wireless router for free, if you ask.
Congratulations on the improvements!
I hope this info was helpful
Mike
[ 02-13-2006, 11:52 AM: Message edited by: Mike Labbe @ GTP ]