BibView is a Web-based interface for viewing and querying bibliographic databases. It converts BibTeX files to HTML using moulinette and combines the resulting data with some AJAX code to prive a dynamic query interface.
The entry field can be used to query the database. Your search string will be interpreted as a case-insensitive disjunction of conjunctions separated by OR. As an example, roussel chapuis OR roussel casiez will get you everything related to (Roussel and Chapuis) or (Roussel and Casiez).
To bookmark a query, just bookmark the "this query" link displayed before the list of results (if any). Note that this will bookmark the query itself, not the results you got.
Feel free to contact me if you have any question or suggestion.