将数据发送到服务器时，查询字符串和cookie的替代方法？

I have a small (or perhaps not so small) issue with some ASP.NET/Castle Monorail sites for a product I work on. This is a fairly legacy system (written well before my time), and it uses GET requests with a considerable amount of information in the query string. We have recently run into query string length limitations, and for the amount of data we need to transfer to the server, storing the data temporarily in a cookie is also not plausible (we are already well past the 4096 byte limit per cookie, and we set a lot of cookies, so we are likely near or at the limit of cookies per domain as well.)I have a small (or perhaps not so small) issue