Most SE bots have got no problem following dynamic links or indexing dynamic pages. But there are a few points to remember...
Google does limit indexing dynamic pages so they don't crash high-load servers. this is plainly written on their webmaster section.
Any variables that you use should NEVER include the letters "id" as that is seen as a session ID, and those pages are usually disregarded. Even something like "u_id" is to be avoided at all costs.
If you want to go high-tech on it, look at rewriting the URL's to make them SE friendly. It's not that hard to do when you get into it, but can take a bit of work to get there, but still well worth the effort.
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