Mike Gunderloy points to arc90's 25 New Ways to use RSS. Here are over 120 more ways to use RSS - all exposed as RSSBus operations:
AmazonOps: feeds that provide access to Amazon services.
AsteriskOps: feeds of voicemail, call connection.
CcOps: feeds for credit card authorization, validation, refunding, voiding.
EbayOps: feeds that provide access to EBay services.
ExcelOps: feeds for retrieving information from Excel spreadsheets
FedexOps: feeds for FedEx shipping, rate queries, and tracking.
FeedOps: feeds for manipulating other RSS feeds (concat, union, insert).
FileOps: feeds for managing files and directories.
FtpOps: feeds for listing and transferring files to and from FTP servers.
GoogleAdwordsOps: feeds that provide access to Google Adwords accounts.
GoogleTalkOps: feeds that sends Google Talk messages.
GoogleSpreadsheetsOps: feeds that provide information from Google Spreadsheets.
ImapOps: feeds for receiving information about mailboxes and email on IMAP servers.
ImOps: feeds for sending Jabber IMs, pager messages, and SMS messages.
LdapOps: feeds for authenticating to and searching LDAP directories.
MediaOps: feeds that provide information about digital media files.
NntpOps: feeds for working with Usenet news servers.
OfxOps: feeds for accessing bank accounts and financial services.
PaypalOps: feeds that provide access to PayPal payment services.
PopOps: feeds for receiving email messages from POP servers.
QbOps: feeds that provide access to Intuit’s QuickBooks.
S3Ops: feeds for working with Amazon S3.
SforceOps: feeds for access to Salesforce.com account objects.
SmtpOps: feeds for sending SMTP email, querying MX records and verifying addresses.
SqlOps: feeds for connecting to and querying SQL databases.
SysOps: feeds for system management information (processes, memory, etc..).
TsvOps: feeds for managing simple tab-separated file databases.
UpsOps: feeds for UPS shipping, rate queries, and tracking.
UspsOps: feeds for postal service shipping and tracking.
YahooOps: feeds for geocoding, mapping, stock quotes, traffic updates, and searching.
If you're interesting in new applications of RSS, easily exposing your existing data as RSS, or quickly creating entire applications based on RSS feeds - take a look at RSSBus.
Technorati tags: rss rssbus