Make sure you periodically go into the 'Running Applications' area within your system settings and clear the cache. I hadn't thought anything of doing this, because most apps will do this themselves, but yesterday my Droid was running a bit slow and I went into that area and noticed the cache for this program had ballooned to 10.5 MBs! Considering the app itself is only 2 MBs, thats quite a lot.
After it was cleared, the phone sped back up.
After it was cleared, the phone sped back up.