Wow, this could be interesting.. =]
Here's one solution, though maybe not the best.
Create a single table, and load up TR's and TD's and yada yada yada with X amount of data, until it reaches the bottom of the page.
Create a second table right next to the first table, and load that up with data much like you did with the first.
I guess the code could look something like:
table
tr
td
table (First dataset)
all your data
/table
/td
td
table (Second dataset)
all your data
/table
/td
/tr
/table
How does that sound? :P It may work...I don't do HTML too much though..