EXPERT RESPONSE
After reviewing Oracle's certification matrix, it appears that Oracle Apps 11.5.10 is supported with both Oracle9i release 2 and Oracle Database 10g release 2 so, in theory, you could migrate to 10g. Because I do not know what operating system your database and application tier reside on, I looked at both Solaris and Linux as examples. This is true for both of these operating systems. Having said that, there is likely a very good reason for your support partners to recommend Oracle 9.2.0.7. I would recommend that you discuss this with your support partners to determine why they are suggesting Oracle 9.2.0.7.
In terms of database support, Oracle recently announced its "Oracle Lifetime Support" model. For as along as you license your Oracle database, there are varying levels of support available. Under this support model, for Oracle9i release 2 premier support ends July 2007 and extended support ends July 2010. For Oracle Database 10g release 2, premier support ends July 2010 and extended support ends July 2013. Sustaining support for both of these database releases is indefinite.
For more information on this support model, visit Oracle's Web site.
Specific support information can be found here.
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