How to sync a table between oracle and sybase

I have a table in **Sybase** (destination) that I would like to keep it synced with a table in **Oracle** (source) I cannot truncate and populate the table in Sybase because it is used by an application, I can only add new records and update changes, changes only happen to one column. In my environment I have Sybase, Oracle, SQL Server & .net development Whats the best, simplest & reliable way to get this task done, should I develop a DTS, a .net app, use linked server of SQL Server or is there a better way?