It sounds like if you are British and a babe you get on the Bond list. The producers of Casino Royale, and of Torchwood for that matter, seem to be in no hurry to end the speculation of who their respective female leads will be. Once they announce that, what the hell else are people going to talk about.
Not suprisingly, there have been several actors who have crossed between Doctor Who and the James Bond films before. Long before he was the Master, Anthony Ainley was an extra in You Only Live Twice. And the Black Guardian himself, Valentine Dyall was in the first version of Casino Royale as none other than Vesper Lynd's assistant.
Honor Blackman, played Proffessor Lasky in WHO's season 23 story Terror of the Vervoids. But Blackman is better known for portraying a certain Bond girl in Goldfinger with one of the most memorable names in the history of cinema. So whatever lucky actress ends up with the new role of Vesper, she will undoubtedly be dissapointed that she didn't get a better Bond girl name such as the eternal Pussy Galore!