The following is a list of technology related companies and their customer service phone numbers.  This lis is by know means complete.  Please feel free to add additional numbers as comments below.

AT&T Telephone/Internet
866-346-1168 (residential)
888-944-0447 (business)

Barracuda Networks
408-342-5300

Cbeyond Communications
800-424-5100

Charter Communications
888-438-2427 (residential)
800-314-7195 (business)

Microsoft Support
Phone support for Microsoft products must be arranged via their Support website at http://support.microsoft.com/select/Default.aspx?target=assistance

Fishbowl Inventory
800-774-7085

Network Solutions
888-642-9314 (sales)
800-333-7680 (support)

Parish Data Systems (PDS)
877-737-4457

ParishSOFT
866-930-4774

TechSoup STOCK
415-633-9300

Time Warner Cable
888-892-2253 (residential)
866-772-4948 (business)