Travel booking site optimisation

[ToddGraham]

I am in the process of optimising a new travel site, which contains a live airline booking engine etc.

The site uses URL session Id's for all users, not just those logged in, and also a cgi-bin in the URL and is built with .jsp Servlet pages.

How can I best optimise the site organically, without losing any of the functionality, tracking abilities?

Can marketing/doorway pages help in this repsect?

All help appreciated.

[seomike]

I'd look into a mod rewrite.

[ToddGraham]

Thanks..is this my only option, could I also look at not showing session ids to bots or is this an inferior solution?